1.nr TN 0 2.\" RT - reset everything to normal state 3.de RT 4.if !\\n(1T .BG 5.if !\\n(IK .if !\\n(IF .if !\\n(IX .if !\\n(BE .di 6.ce 0 7.ul 0 8.if \\n(NX<=1 .if \\n(AJ=0 .ll \\n(LLu 9.if \\n(IF=0 \{\ 10. ps \\n(PS 11. if \\n(VS>=40 .vs \\n(VSu 12. if \\n(VS<=39 .vs \\n(VSp\} 13.if \\n(IP .in -\\n(I\\n(IRu 14.if \\n(IP=0 .nr I0 \\n(PIu 15.if \\n(IP .nr IP -1 16.if \\n(QP \{\ 17. ll +\\n(QIu 18. in -\\n(QIu 19. nr QP -1\} 20.ft 1 21.bd 1 22.ta 5n 10n 15n 20n 25n 30n 35n 40n 45n 50n 55n 60n 65n 70n 75n 80n 23.fi 24.. 25. \"IZ - initialization 26.de IZ 27.if \\n(FM=0 .nr FM 1i 28.nr YY -\\n(FMu 29.nr XX 0 1 30.nr IP 0 31.nr PI 5n 32.nr QI 5n 33.nr I0 \\n(PIu 34.nr PS 10 35.nr VS 12 36.if !\\n(PD .if n .nr PD 1v 37.if !\\n(PD .if t .nr PD 0.3v 38.nr ML 3v 39.ps \\n(PS 40.if \\n(VS>40 .vs \\n(VSu 41.if \\n(VS<=39 .vs \\n(VSp 42.nr IR 0 43.nr TB 0 44.nr SJ \\n(.j 45.nr LL 6i 46.ll \\n(LLu 47.nr LT \\n(.l 48.lt \\n(LTu 49.ev 1 50.nr FL \\n(LLu*11u/12u 51.ll \\n(FLu 52.ps 8 53.vs 10p 54.ev 55.if \\*(CH .ds CH "\(hy \\\\n(PN \(hy 56.if n .ds CF "\\*(DY 57.wh 0 NP 58.wh -\\n(FMu FO 59.ch FO 16i 60.wh -\\n(FMu FX 61.ch FO -\\n(FMu 62.wh -\\n(FMu/2u BT 63.. 64.de TM 65.if \\n(IM=0 .if \\n(MN=0 .pn 0 66.so /usr/lib/tmac/tmac.scover 67.if \\n(IM=0 .if \\n(MN=0 .rm IM 68.if \\n(IM=0 .if \\n(MN=0 .rm MF 69.if \\n(IM=0 .if \\n(MN=0 .rm MR 70.if \\n(.T=0 .pi /usr/bin/col 71.nr ST 1 72.ds QF MEMORANDUM FOR FILE 73.br 74.ds MN \\$1 75.if !"\\$1"" .nr MM 1 76.if !"\\$2"" .nr MC 1 77.if !"\\$3"" .nr MG 1 78.nr TN 1 79.if \\n(.$-1 .ds CA \\$2 80.if \\n(.$-2 .ds CC \\$3 81.rm RP 82.rm S0 83.rm S2 84.rm AX 85.. 86. \" IM - internal memorandum 87.de IM 88.nr IM 1 89.TM "\\$1" "\\$2" "\\$3" 90.rm QF 91.RA 92.rm RA 93.rm RP 94.rm MF 95.rm MR 96.. 97. \" MF - memorandum for file. 98.de MF 99.nr MN 1 100.TM "\\$1" "\\$2" "\\$3" 101.rm MR 102.rm IM 103.RA 104.rm RA 105.rm RP 106.rm TM 107.. 108. \" MR - memo for record 109.de MR 110.nr MN 2 111.TM "\\$1" "\\$2" "\\$3" 112.ds QF MEMORANDUM FOR RECORD 113.rm MF 114.RA 115.rm RA 116.rm RP 117.rm IM 118.rm TM 119.. 120.de EG 121.nr MN 3 122.TM "\\$1" "\\$2" "\\$3" 123.ds QF ENGINEER'S NOTES 124.rm MF 125.rm RP 126.rm IM 127.RA 128.rm RA 129.rm TM 130.. 131.de OK 132.br 133.di 134.di OD 135.. 136.de RP 137.nr ST 2 138.pn 0 139.rm SG 140.rm CS 141.rm TM 142.rm QF 143.rm IM 144.rm MR 145.rm MF 146.rm EG 147.br 148.. 149.de TR \" Comp. Sci. Tech Rept series. 150.nr ST 3 151.pn 0 152.ds MN \\$1 153.rm SG 154.rm CS 155.rm TM 156.rm QF 157.rm IM 158.rm MR 159.rm MF 160.rm EG 161.br 162.. 163. \"TL - title and initialization 164.de TL 165.br 166.nr TV 1 167.if \\n(IM>0 .rm CS 168.if \\n(MN>0 .rm CS 169.ME 170.rm ME 171.di WT 172.nr SJ \\n(.j 173.na 174.fi 175.ll 5.0i 176.if n .if \\n(TN .ll 30 177.if t .if \\n(TN .ll 3.5i 178.ft 3 179.ps 10 180.if !\\n(TN .ps 12 181.if !\\n(TN .rm CS 182.hy 0 183.. 184.de TX 185.rs 186.sp .5i 187.ce 1000 188.if n .ul 1000 189.ps 12 190.ft 3 191.vs 15p 192.ne 4 193.hy 0 194.WT 195.hy 14 196.ce 0 197.ul 0 198.. 199. \" AU - author(s) 200.de AU 201.nr AV 1 202.ad \\n(SJ 203.br 204.di 205.br 206.nf 207.nr NA +1 208.ds R\\n(NA \\$1 209.ds E\\n(NA \\$2 210.di A\\n(NA 211.ll \\n(LLu 212.if \\n(TN=0 .if t .ft 2 213.if \\n(TN=0 .if n .ft 1 214.if \\n(TN>0 .ft 3 215.if \\n(TN .if n .ll 16 216.if \\n(TN .if t .ll 1.4i 217.ps 10 218.. 219.de AX 220.ft 1 221.rs 222.ce 1000 223.if n .ul 0 224.ps 10 225.vs 12p 226.if n .sp 2 227.if t .sp 228.A1 229.if n .sp 230.if t .sp 0.5 231.ns 232.I1 233.if \\n(NA-1 .if n .sp 2 234.if \\n(NA-1 .if t .sp 235.A2 236.if \\n(NA-1 .if n .sp 237.if \\n(NA-1 .if t .sp 0.5 238.ns 239.I2 240.if \\n(NA-2 .if t .sp 241.if \\n(NA-2 .if n .sp 2 242.A3 243.if \\n(NA-2 .if t .sp 0.5 244.if \\n(NA-2 .if n .sp 245.ns 246.I3 247.if \\n(NA-3 .if t .sp 248.if \\n(NA-3 .if n .sp 2 249.A4 250.if \\n(NA-3 .if t .sp 0.5 251.if \\n(NA-3 .if n .sp 252.ns 253.I4 254.if \\n(NA-4 .if t .sp 255.if \\n(NA-4 .if n .sp 2 256.A5 257.if \\n(NA-4 .if n .sp 258.if \\n(NA-4 .if t .sp 0.5 259.ns 260.I5 261.if \\n(NA-5 .if t .sp 262.if \\n(NA-5 .if n .sp 2 263.A6 264.if \\n(NA-5 .if n .sp 265.if \\n(NA-5 .if t .sp 0.5 266.ns 267.I6 268.if \\n(NA-6 .if t .sp 269.if \\n(NA-6 .if n .sp 2 270.A7 271.if \\n(NA-6 .if n .sp 272.if \\n(NA-6 .if t .sp 0.5 273.ns 274.I7 275.if \\n(NA-7 .if t .sp 276.if \\n(NA-7 .if n .sp 2 277.A8 278.if \\n(NA-7 .if n .sp 279.if \\n(NA-7 .if t .sp 0.5 280.ns 281.I8 282.if \\n(NA-8 .if t .sp 283.if \\n(NA-8 .if n .sp 2 284.A9 285.if \\n(NA-8 .if n .sp 286.if \\n(NA-8 .if t .sp 0.5 287.ns 288.I9 289.. 290. \"AI - authors institution 291.de AI 292.br 293.ft 1 294.di 295.di I\\n(NA 296.nf 297.. 298. \"AB - begin an abstract 299.de AB 300.br 301.di 302.ul 0 303.ce 0 304.nr 1T 1 305.nr IK 1 306.nr KI 1 307.di WB 308.rs 309.nr AJ 1 310.ce 1 311.ft 2 312.if n .ul 313.ll \\n(LLu 314.if \\n(.$=0 ABSTRACT 315.if \\n(.$>0 .if !"\\$1"-" .if !"\\$1"no" \\$1 316.if \\n(.$=0 .sp 317.if \\n(.$>0 .if !"\\$1"-" .if !"\\$1"no" .sp 318.hy 14 319.ul 0 320.ce 0 321.fi 322.ft 1 323.nr OJ \\n(.i 324.in +\\n(.lu/12u 325.ll -\\n(.lu/12u 326.br 327.ps \\n(PS 328.if \\n(VS>40 .vs \\n(VSu 329.if \\n(VS<=39 .vs \\n(VSp 330.ti +\\n(PIu 331.. 332. \"AE - end of an abstract 333.de AE 334.br 335.di 336.ll \\n(LLu 337.ps \\n(PS 338.if \\n(VS>40 .vs \\n(VSu 339.if \\n(VS<=39 .vs \\n(VSp 340.nr 1T 0 341.nr IK 0 342.in \\n(OJu 343.nr AJ 0 344.di 345.ce 0 346.if \\n(ST=2 .SY 347.if \\n(ST<3 .rm SY 348.. 349. \"S2 - release paper style 350. \"SY - cover sheet of released paper 351.de SY 352.ll \\n(LLu 353.ns 354.if \\n(TV .TX 355.if \\n(AV .AX 356.rs 357.ce 0 358.nf 359.sp 3 360.ls 1 361.WB 362.ls 363.sp 3v 364\\*(DY 365.sp |9i 366.if \\n(FP>0 .FA 367.FG 368.if \\n(GA=1 .nr GA 2 369.fi 370.. 371. \"S2 - first text page, released paper format 372.de S2 373.ce 0 374.br 375.SY 376.rm SY 377.bp 1 378.if \\n(TV .TX 379.if \\n(AV .AX 380.rs 381.ce 0 382.ft 1 383.ad \\n(SJ 384.. 385. \"S0- mike lesk conserve paper style 386.de S0 387.ce 0 388.br 389.ll \\n(LLu 390.if \\n(TV+\\n(AV>0 .ns 391.if \\n(TV .TX 392.if \\n(AV .AX 393.if \\n(TV+\\n(AV>0 .rs 394.ce 0 395.if \\n(TV>0 .sp 2 396.ls 1 397.if \\n(FP>0 \{\ 398. FJ 399. nf 400. FG 401. fi 402. FK 403. nr FP 0\} 404.nf 405.WB 406.ls 407.fi 408.ad \\n(SJ 409.. 410. \"S3 - CSTR style 411.de S3 412.rs 413.sp |2.25i 414.ce 1000 415.I1 416.if \\n(NA>1 .sp .5 417.if \\n(NA>1 .I2 418.if \\n(NA>2 .sp .5 419.if \\n(NA>2 .I3 420.if \\n(NA>3 .sp .5 421.if \\n(NA>3 .I4 422.if \\n(NA>4 .sp .5 423.if \\n(NA>4 .I5 424.if \\n(NA>5 .sp .5 425.if \\n(NA>5 .I6 426.if \\n(NA>6 .sp .5 427.if \\n(NA>6 .I7 428.if \\n(NA>7 .sp .5 429.if \\n(NA>7 .I8 430.if \\n(NA>8 .sp .5 431.if \\n(NA>8 .I9 432.sp |4i 433. \"check how long title is: can space extra .25 inch if short 434.di EZ 435.WT 436.di 437.if \\n(dn<1.5v .if \\n(NA=1 .sp .25i 438.ft 1 439Computing Science Technical Report No. \\*(MN 440.sp 441.if t .ft 3 442.if n .ul 100 443.ps 12 444.vs 15p 445.hy 0 446.WT 447.hy 14 448.ft 1 449.if n .ul 0 450.ps 10 451.vs 12p 452.sp 453.ft 1 454.A1 455.A2 456.A3 457.A4 458.A5 459.A6 460.A7 461.A8 462.A9 463.ce 0 464.sp |8.5i 465.ce 0 466\\*(DY 467.bp 0 468.ft 1 469.S2 470.. 471. \"SG - signature 472.de SG 473.br 474.KS 475.in +2u*\\n(.lu/3u 476.sp 2 477.A1 478.if \\n(NA-1 .sp 2 479.A2 480.if \\n(NA-2 .sp 2 481.A3 482.if \\n(NA-3 .sp 2 483.A4 484.if \\n(NA-4 .sp 2 485.A5 486.if \\n(NA>5 .sp 2 487.A6 488.if \\n(NA>6 .sp 2 489.A7 490.if \\n(NA>7 .sp 2 491.A8 492.if \\n(NA>8 .sp 2 493.A9 494.in 495.nf 496.sp -1 497.if \\n(.$>=1 \\$1 498.if \\n(.$>=2 \\$2 499.if \\n(.$>=3 \\$3 500.if \\n(.$>=4 \\$4 501.if \\n(.$>=5 \\$5 502.if \\n(.$>=6 \\$6 503.if \\n(.$>=7 \\$7 504.if \\n(.$>=8 \\$8 505.if \\n(.$>=9 \\$9 506.fi 507.br 508.KE 509.. 510. \"Tables. TS - table start, TE - table end 511.de TS 512.br 513.if !\\n(1T .RT 514.ul 0 515.ti \\n(.iu 516.if t .sp 0.5 517.if n .sp 518.if \\$1H .TQ 519.nr IX 1 520.. 521.de TQ 522.di TT 523.nr IT 1 524.. 525.de TH 526.if \\n(.d>0.5v .nr T. 0 527.if \\n(.d>0.5v .T# 0 528.di 529.nr TQ \\n(.i 530.nr HT 1 531.in 0 532.TT 533.in \\n(TQu 534.mk #T 535.. 536.de TE 537.nr IX 0 538.if \\n(IT>0 .if \\n(HT=0 .di 539.if \\n(IT>0 .if \\n(HT=0 .nr EF \\n(.u 540.if \\n(IT>0 .if \\n(HT=0 .nf 541.if \\n(IT>0 .if \\n(HT=0 .TT 542.if \\n(IT>0 .if \\n(HT=0 .if \\n(EF>0 .fi 543.nr IT 0 544.nr HT 0 545.if n .sp 1 546.if t .sp 0.5 547.rm a+ b+ c+ d+ e+ f+ g+ h+ i+ j+ k+ l+ n+ m+ 548.rr 32 33 34 35 36 37 38 40 79 80 81 82 549.rr a| b| c| d| e| f| g| h| i| j| k| l| m| 550.rr a- b- c- d- e- f- g- h- i- j- k- l- m- 551.. 552. \"DS - display. If .DS C, center; L, left-adjust; I, indent. 553.de DS 554.XD 555.KS 556.nf 557.\\$1D \\$2 \\$1 558.ft 1 559.ps \\n(PS 560.if \\n(VS>40 .vs \\n(VSu 561.if \\n(VS<=39 .vs \\n(VSp 562.. 563.de D 564.ID \\$1 565.. 566.de CD 567.ce 1000 568.. 569.de ID 570.if t .in +0.5i 571.if n .in +8 572.if \\n(.$ .if !"\\$1"I" .in \\n(OIu 573.if \\n(.$ .if !"\\$1"I" .in +\\$1n 574.. 575.de LD 576.. 577.de XD 578.nf 579.nr OI \\n(.i 580.if t .sp 0.5 581.if n .sp 1 582.. 583.de BD \" block display: save everything, then center it. 584.nr BD 1 585.nf 586.di DD 587.. 588. \"DE - display end 589.de DE 590.ce 0 591.if \\n(BD>0 .DF 592.nr BD 0 593.KE 594.in \\n(OIu 595.if t .sp 0.5 596.if n .sp 1 597.fi 598.. 599.de DF \" finish a block display to be recentered. 600.di 601.if \\n(dl>\\n(BD .nr BD \\n(dl 602.if \\n(BD<\\n(.l .in (\\n(.lu-\\n(BDu)/2u 603.nr EI \\n(.l-\\n(.i 604.ta \\n(EIuR 605.DD 606.in \\n(OIu 607.. 608. \"KS keep - for keep release features. As in IFM 609.de KS 610.nr KN \\n(.u 611.if \\n(IK=0 .if \\n(IF=0 .KQ 612.nr IK +1 613.. 614. \"KQ - real keep processor 615.de KQ 616.br 617.nr KI \\n(.i 618.ev 2 619.br 620.in \\n(KIu 621.ps \\n(PS 622.if \\n(VS>40 .vs \\n(VSu 623.if \\n(VS<=39 .vs \\n(VSp 624.ll \\n(LLu 625.lt \\n(LTu 626.if \\n(NX>1 .ll \\n(CWu 627.if \\n(NX>1 .lt \\n(CWu 628.di KK 629.nr TB 0 630.. 631. \"KF - floating keep 632.de KF 633.nr KN \\n(.u 634.if !\\n(IK .FQ 635.nr IK +1 636.. 637. \"FQ real floating keep processor 638.de FQ 639.nr KI \\n(.i 640.ev 2 641.br 642.in \\n(KIu 643.ps \\n(PS 644.if \\n(VS>40 .vs \\n(VSu 645.if \\n(VS<=39 .vs \\n(VSp 646.ll \\n(LLu 647.lt \\n(LTu 648.if \\n(NX>1 .ll \\n(CWu 649.if \\n(NX>1 .lt \\n(CWu 650.di KK 651.nr TB 1 652.. 653. \"KE release - everything between keep and release is together 654.de KE 655.if \\n(IK .if !\\n(IK-1 .if \\n(IF=0 .RQ 656.if \\n(IK .nr IK -1 657.. 658. \"RQ real release 659.de RQ 660.br 661.di 662.nr NF 0 663.if \\n(dn-\\n(.t .nr NF 1 664.if \\n(TC .nr NF 1 665.if \\n(NF .if !\\n(TB .sp 200 666.if !\\n(NF .if \\n(TB .nr TB 0 667.nf 668.rs 669.nr TC 5 670.in 0 671.ls 1 672.if \\n(TB=0 .ev 673.if \\n(TB=0 .br 674.if \\n(TB=0 .ev 2 675.if \\n(TB=0 .KK 676.ls 677.ce 0 678.if \\n(TB=0 .rm KK 679.if \\n(TB .da KJ 680.if \\n(TB \!.KD \\n(dn 681.if \\n(TB .KK 682.if \\n(TB .di 683.nr TC \\n(TB 684.if \\n(KN .fi 685.in 686.ev 687.. 688.de EQ \"equation, breakout and display 689.nr EF \\n(.u 690.rm EE 691.nr LE 1 \" 1 is center 692.ds EL \\$1 693.if "\\$1"L" .ds EL \\$2 694.if "\\$1"L" .nr LE 0 695.if "\\$1"C" .ds EL \\$2 696.if "\\$1"I" .nr LE 0 697.if "\\$1"I" .ds EE \\h'|10n' 698.if "\\$1"I" .if !"\\$3"" .ds EE \\h'\\$3' 699.if "\\$1"I" .ds EL \\$2 700.if \\n(YE>0 .nf 701.di EZ 702.. 703.de EN \" end of a displayed equation 704.br 705.di 706.rm EZ 707.nr ZN \\n(dn 708.if \\n(ZN>0 .if \\n(YE=0 .LP 709.if \\n(ZN=0 .if !"\\*(EL"" .nr ZN 1 710.if "\\n(.z"" .if \\n(ZN>0 .if !\\n(nl=\\n(PE .if t .sp .5 711.if "\\n(.z"" .if \\n(ZN>0 .if !\\n(nl=\\n(PE .if n .sp 1 712.if !"\\n(.z"" .if \\n(ZN>0 .if !\\n(.d=\\n(PE .if t .sp .5 713.if !"\\n(.z"" .if \\n(ZN>0 .if !\\n(.d=\\n(PE .if n .sp 1 714.pc 715.if \\n(BD>0 .nr LE 0 \" can't mean centering in this case. 716.if \\n(MK>0 .if \\n(LE=1 .ds EE \\h'|10n' 717.if \\n(MK>0 .nr LE 0 \" don't center if mark/lineup 718.lt \\n(.lu 719.if \\n(EP=0 .if \\n(ZN>0 .if \\n(LE>0 .tl \(ts\(ts\\*(10\(ts\\*(EL\(ts 720.if \\n(EP=0 .if \\n(ZN>0 .if \\n(LE=0 .if \\n(BD=0 .tl \(ts\\*(EE\\*(10\(ts\(ts\\*(EL\(ts 721.if \\n(EP=0 .if \\n(ZN>0 .if \\n(LE=0 .if \\n(BD>0 .if \\n(BD<\\w\(ts\\*(10\(ts .nr BD \\w\(ts\\*(10\(ts 722.if \\n(EP=0 .if \\n(ZN>0 .if \\n(LE=0 .if \\n(BD>0 \!\\*(10\\t\\*(EL 723.if \\n(EP>0 .if \\n(ZN>0 .if \\n(LE>0 .tl \(ts\\*(EL\(ts\\*(10\(ts\(ts 724.if \\n(EP>0 .if \\n(ZN>0 .if \\n(LE=0 .if \\n(BD=0 .tl \(ts\\*(EL\\*(EE\\*(10\(ts\(ts\(ts 725.if \\n(EP>0 .if \\n(ZN>0 .if \\n(LE=0 .if \\n(BD>0 .if \\n(BD<\\w\(ts\\*(10\(ts .nr BD \\w\(ts\\*(10\(ts 726.if \\n(EP>0 .if \\n(ZN>0 .if \\n(LE=0 .if \\n(BD>0 \!\\h'-\\\\n(.iu'\\*(EL\\h'|0'\\*(10 727.\".di EZ \" GCOS patch 728.\"\\*(10 \" GCOS patch 729.\".br \" GCOS patch 730.\".di \" GCOS patch 731.\".rm EZ \" GCOS patch 732.lt \\n(LLu 733.pc % 734.if \\n(YE>0 .if \\n(EF>0 .fi 735.rm EL 10 11 12 13 14 15 16 17 18 19 20 21 22 23 736.rr 10 11 12 13 14 15 16 17 18 19 20 21 22 23 737.if \\n(ZN>0 .if t .sp .5 738.if \\n(ZN>0 .if n .sp 739.if "\\n(.z"" .nr PE \\n(nl 740.if !"\\n(.z"" .nr PE \\n(.d 741.. 742.de ME 743.nr SJ \\n(.j 744.if \\n(LL>0 .nr LT \\n(LL 745.nr YE 1 746.if \\n(PO=0 .nr PO \\n(.o 747.. 748. \"EM end up macro - process left over keep-release 749.de EM 750.br 751.if \\n(TB=0 .if t .wh -1p CM 752.if \\n(TB \&\c 753.if \\n(TB 'bp 754.if \\n(TB .NP 755.if \\n(TB .ch CM 160 756.. 757. \"NP new page 758.de NP 759.if \\n(FM+\\n(HM>=\\n(.p .tm Margins bigger than page length. 760.if \\n(FM+\\n(HM>=\\n(.p .ab 761.if \\n(FM+\\n(HM>=\\n(.p .ex 762.nr PX \\n(.s 763.nr PF \\n(.f 764.if t .CM 765.if \\n(HM=0 .nr HM 1i 766'sp \\n(HMu/2u 767.lt \\n(LTu 768.ps \\n(PS 769.ft 1 770.if \\n(PO>0 .po \\n(POu 771.PT 772.ps \\n(PX 773.ft \\n(PF 774'sp |\\n(HMu 775.nr XX 0 1 776.nr YY 0-\\n(FMu 777.ch FO 16i 778.ch FX 17i 779.ch FO -\\n(FMu 780.ch FX \\n(.pu-\\n(FMu 781.if \\n(MF .FV 782.nr MF 0 783.mk 784.os 785.ev 1 786.if \\n(TD=0 .if \\n(TC<5 .XK 787.nr TC 0 788.ns 789.ev 790.nr TQ \\n(.i 791.nr TK \\n(.u 792.if \\n(IT>0 \{\ 793. in 0 794. nf 795. TT 796. in \\n(TQu 797. if \\n(TK .fi\ 798\} 799.mk #T 800.if t .if \\n(.o+\\n(LL>7.75i .tm Offset + line length exceeds 7.75 inches, too wide 801.. 802.de XK 803.nr TD 1 804.nf 805.ls 1 806.in 0 807.rn KJ KL 808.KL 809.rm KL 810.if "\\n(.z"KJ" .di 811.nr TB 0 812.if "\\n(.z"KJ" .nr TB 1 813.br 814.in 815.ls 816.fi 817.nr TD 0 818.. 819.de KD 820.nr KM 0 821.if "\\n(.z"KJ" .nr KM 1 \" KM is 1 if in a rediversion of keeps 822.if \\n(KM>0 \!.KD \\$1 823.if \\n(KM=0 .if \\n(.t<\\$1 .di KJ 824.. 825.de PT 826.lt \\n(LLu 827.pc % 828.nr PN \\n% 829.if \\n%-1 .tl '\\*(LH'\\*(CH'\\*(RH' 830.lt \\n(.lu 831.. 832. \"FO - footer of page 833.de FO 834.rn FO FZ 835.if \\n(K1>0 .tm This memo has a multi-page cover sheet. You are 836.if \\n(K1>0 .tm rebuked in the name of the Committee on Technical Memoranda. 837.if \\n(IT>0 .nr T. 1 838.if \\n(IT>0 .if \\n(FC=0 .T# 1 839.if \\n(IT>0 .br 840.nr FC +1 841.if \\n(NX<2 .nr WF 0 842.nr dn 0 843.if \\n(FC<=1 .if \\n(XX .XF 844.rn FZ FO 845.nr MF 0 846.if \\n(dn .nr MF 1 847.if !\\n(WF .nr YY 0-\\n(FMu 848.if !\\n(WF .ch FO \\n(YYu 849.if !\\n(dn .nr WF 0 850.if \\n(FC<=1 .if \\n(XX=0 .if \\n(NX>1 .RC 851.if \\n(FC<=1 .if \\n(XX=0 .if \\n(NX<1 'bp 852.nr FC -1 853.if \\n(ML>0 .ne \\n(MLu 854.. 855. \"2C - begin double column 856.de 2C 857.MC \" default MC is double column 858.. 859.de MC \" multiple columns- arg is line length 860.nr L1 \\n(LL*7/15 861.if \\n(.$>0 .nr L1 \\$1n 862.nr GW 0-1 863.if \\n(.$>1 .nr GW \\$1n 864.nr NQ \\n(LL/\\n(L1 865.if \\n(NQ<1 .nr NQ 1 866.if \\n(NQ>2 .if (\\n(LL%\\n(L1)=0 .nr NQ -1 867.if \\n(1T=0 \{\ 868. BG 869. if n .sp 4 870. if t .sp 2\} 871.if \\n(NX=0 .nr NX 1 872.if !\\n(NX=\\n(NQ \{\ 873. RT 874. if \\n(NX>1 .bp 875. mk 876. nr NC 1 877. po \\n(POu\} 878.if \\n(NQ>1 .hy 12 879.nr NX \\n(NQ 880.nr CW \\n(L1 881.ll \\n(CWu 882.nr FL \\n(CWu*11u/12u 883.if \\n(NX>1 .nr GW (\\n(LL-(\\n(NX*\\n(CW))/(\\n(NX-1) 884.nr RO \\n(CW+\\n(GW 885.ns 886.. 887.de RC 888.if \\n(NC>=\\n(NX .C2 889.if \\n(NC<\\n(NX .C1 890.nr NC \\n(ND 891.. 892.de C1 893.rt 894.po +\\n(ROu 895.nr ND \\n(NC+1 896.nr XX 0 1 897.if \\n(MF .FV 898.ch FX \\n(.pu-\\n(FMu 899.ev 1 900.if \\n(TB .XK 901.nr TC 0 902.ev 903.nr TQ \\n(.i 904.if \\n(IT>0 .in 0 905.if \\n(IT>0 .TT 906.if \\n(IT>0 .in \\n(TQu 907.mk #T 908.ns 909.. 910.ch FO \\n(YYu 911.de C2 912.po \\n(POu 913'bp 914.nr ND 1 915.. 916. \"1C - return to single column format 917.de 1C 918.MC \\n(LLu 919.hy 14 920.. 921. \".de R3 922. \".pl 102 923. \".nr LT \\n(.l 924. \".. 925.de MH 926Bell Laboratories 927Murray Hill, New Jersey 07974 928.. 929.de PY 930Bell Laboratories 931Piscataway, New Jersey 08854 932.. 933.de BT 934.nr PX \\n(.s 935.nr PF \\n(.f 936.ft 1 937.ps \\n(PS 938'lt \\n(LTu 939.po \\n(POu 940.if \\n%>0 .tl '\\*(LF'\\*(CF'\\*(RF' 941.ft \\n(PF 942.ps \\n(PX 943.. 944. \"PP - paragraph 945.de PP 946.RT 947.ne 1.1 948.if \\n(1T .sp \\n(PDu 949.ti +\\n(PIu 950.. 951. \"SH - (unnumbered) section heading 952.de SH 953.ti \\n(.iu 954.RT 955.if \\n(1T .sp 1 956.if !\\n(1T .BG 957.RT 958.ne 4 959.ft 3 960.if n .ul 1000 961.. 962. \"NH - numbered heading 963.de NH 964.RT 965.if \\n(1T .sp 1 966.if !\\n(1T .BG 967.RT 968.ne 4 969.ft 3 970.if n .ul 1000 971.nr NS \\$1 972.if !\\n(.$ .nr NS 1 973.if !\\n(NS .nr NS 1 974.nr H\\n(NS +1 975.if !\\n(NS-4 .nr H5 0 976.if !\\n(NS-3 .nr H4 0 977.if !\\n(NS-2 .nr H3 0 978.if !\\n(NS-1 .nr H2 0 979.if !\\$1 .if \\n(.$ .nr H1 1 980.ds SN \\n(H1. 981.ti \\n(.iu 982.if \\n(NS-1 .as SN \\n(H2. 983.if \\n(NS-2 .as SN \\n(H3. 984.if \\n(NS-3 .as SN \\n(H4. 985.if \\n(NS-4 .as SN \\n(H5. 986\\*(SN 987.. 988. \"BG - begin, execute at first PP 989.de BG 990.br 991.ME 992.rm ME 993.di 994.ce 0 995.nr KI 0 996.hy 14 997.nr 1T 1 998.S\\n(ST 999.rm S0 1000.rm S1 1001.rm S2 1002.rm S3 1003.rm OD 1004.rm OK 1005.rm TX 1006.rm AX 1007.rm WT 1008.rm CS 1009.rm TM 1010.rm IM 1011.rm MF 1012.rm MR 1013.rm RP 1014.rm I1 1015.rm I2 1016.rm I3 1017.rm I4 1018.rm I5 1019.rm CB 1020.rm E1 1021.rm E2 1022.de TL 1023.ft 3 1024.sp 1025.if n .ul 100 1026.ce 100 1027.LG 1028\\.. 1029.de AU 1030.ft 2 1031.if n .ul 0 1032.ce 100 1033.sp 1034.NL 1035\\.. 1036.de AI 1037.ft 1 1038.ce 100 1039.if n .ul 0 1040.if n .sp 1041.if t .sp .5 1042.NL 1043\\.. 1044.RA 1045.rm RA 1046.rn FJ FS 1047.rn FK FE 1048.nf 1049.ev 1 1050.ps \\n(PS-2 1051.vs \\n(.s+2p 1052.ev 1053.if \\n(KG=0 .nr FP 0 1054.if \\n(GA>1 .if \\n(KG=0 .nr GA 0 \" next UNIX must be flagged. 1055.nr KG 0 1056.if \\n(FP>0 .FS 1057.if \\n(FP>0 .FG 1058.if \\n(FP>0 .FE 1059.br 1060.if \\n(TV>0 .if n .sp 2 1061.if \\n(TV>0 .if t .sp 1 1062.fi 1063.ll \\n(LLu 1064.. 1065.de RA \"redefine abstract macros 1066.de AB 1067.br 1068.if !\\n(1T .BG 1069.ce 1 1070.sp 1 1071.if \\n(.$=0 ABSTRACT 1072.if \\n(.$>0 .if !"\\$1"-" .if !"\\$1"no" \\$1 1073.if \\n(.$=0 .sp 1074.if \\n(.$>0 .if !"\\$1"-" .if !"\\$1"no" .sp 1075.sp 1 1076.nr AJ 1 1077.in +\\n(.lu/12u 1078.ll -\\n(.lu/12u 1079.RT 1080\\.. 1081.de AE 1082.nr AJ 0 1083.br 1084.in 0 1085.ll \\n(LLu 1086.if \\n(VS>40 .vs \\n(VSu 1087.if \\n(VS<=39 .vs \\n(VSp 1088\\.. 1089.. 1090. \"IP - indented paragraph 1091.de IP 1092.RT 1093.if !\\n(IP .nr IP +1 1094.sp \\n(PDu 1095.ne 3v 1096.if \\n(.$-1 .nr I\\n(IR \\$2n 1097.in +\\n(I\\n(IRu 1098.nr TY \\n(TZ-\\n(.i 1099.ta \\n(I\\n(IRu \\n(TYuR 1100.if \\n(.$>0 \{\ 1101.ti -\\n(I\\n(IRu 1102\&\\$1\t\c\} 1103.. 1104. \"LP - left aligned (block) paragraph 1105.de LP 1106.ti \\n(.iu 1107.RT 1108.if \\n(1T .sp \\n(PDu 1109.ne 1.1 1110.. 1111.de QP 1112.ti \\n(.iu 1113.RT 1114.if \\n(1T .sp \\n(PDu 1115.ne 1.1 1116.nr QP 1 1117.in +\\n(QIu 1118.ll -\\n(QIu 1119.ti \\n(.iu 1120.. 1121. \"IE - synonym for .LP 1122.de IE 1123.LP 1124.. 1125. \"LB - label paragraph 1126.de LB 1127.in +\\n(I\\n(IRu 1128.ta \\n(I\\n(IRu 1129.if \\n(.$ .ti -\\n(I\\n(IRu 1130.if \\n(.$ \&\\$1\t\c 1131.. 1132.de XP 1133.RT 1134.if !\\n(IP .nr IP +1 1135.sp \\n(PDu 1136.ne 3 1137.if \\n(.$-2 .nr I\\n(IR \\$3n 1138.in +\\n(I\\n(IRu 1139.ta \\n(I\\n(IRu/2u \\n(I\\n(IRu 1140.ti -\\n(I\\n(IRu 1141\0\\$1\t\\$2\t\c 1142.. 1143. \"RS - prepare for double indenting 1144.de RS 1145.nr IS \\n(IP 1146.RT 1147.nr IP \\n(IS 1148.if \\n(IP>0 .in +\\n(I\\n(IRu 1149.nr IR +1 1150.nr I\\n(IR \\n(PIu 1151.in +\\n(I\\n(IRu 1152.nr TY \\n(TZ-\\n(.i 1153.ta \\n(TYuR 1154.. 1155. \"RE - retreat to the left 1156.de RE 1157.nr IS \\n(IP 1158.RT 1159.nr IP \\n(IS 1160.nr IR -1 1161.if \\n(IP<=0 .in -\\n(I\\n(IRu 1162.. 1163.de TC 1164.nr TZ \\n(.lu 1165.if \\n(.$ .nr TZ \\$1n 1166.ta \\n(TZuR 1167.. 1168.de TD 1169.LP 1170.nr TZ 0 1171.. 1172. \"CM - cut mark 1173.de CM 1174.po 0 1175.lt 7.6i 1176.ft 1 1177.ps 10 1178.vs 4p 1179.tl '--''--' 1180.po 1181.vs 1182.lt 1183.ps 1184.ft 1185.. 1186. \"B - bold font 1187.de B 1188.nr PQ \\n(.f 1189.if t .ft 3 1190.if "\\$1"" .if n .ul 1000 1191.if !"\\$1"" .if n .ul 1 1192.if t .if !"\\$1"" \&\\$1\\f\\n(PQ\\$2 1193.if n .if \\n(.$=1 \&\\$1 1194.if n .if \\n(.$>1 \&\\$1\\c 1195.if n .if \\n(.$>1 \\&\\$2 1196.. 1197. \"R - Roman font 1198.de R 1199.if n .ul 0 1200.ft 1 1201.. 1202. \"I - italic font 1203.de I 1204.nr PQ \\n(.f 1205.if t .ft 2 1206.if "\\$1"" .if n .ul 1000 1207.if !"\\$1"" .if n .ul 1 1208.if t .if !"\\$1"" \&\\$1\\f\\n(PQ\\$2 1209.if n .if \\n(.$=1 \&\\$1 1210.if n .if \\n(.$>1 \&\\$1\\c 1211.if n .if \\n(.$>1 \\&\\$2 1212.. 1213. \"TA - tabs set in ens or chars 1214.de TA 1215.ta \\$1n \\$2n \\$3n \\$4n \\$5n \\$6n \\$7n \\$8n \\$9n 1216.. 1217. \"SM - make smaller size 1218.de SM 1219.ps -2 1220.. 1221. \"LG - make larger size 1222.de LG 1223.ps +2 1224.. 1225. \"NL - return to normal size 1226.de NL 1227.ps \\n(PS 1228.. 1229. \"DA - force date; ND - no date or new date. 1230.de DA 1231.if \\n(.$ .ds DY \\$1 \\$2 \\$3 \\$4 1232.ds CF \\*(DY 1233.. 1234.de ND 1235.ds DY \\$1 \\$2 \\$3 \\$4 1236.rm CF 1237.. 1238.if \n(mo-0 .ds MO January 1239.if \n(mo-1 .ds MO February 1240.if \n(mo-2 .ds MO March 1241.if \n(mo-3 .ds MO April 1242.if \n(mo-4 .ds MO May 1243.if \n(mo-5 .ds MO June 1244.if \n(mo-6 .ds MO July 1245.if \n(mo-7 .ds MO August 1246.if \n(mo-8 .ds MO September 1247.if \n(mo-9 .ds MO October 1248.if \n(mo-10 .ds MO November 1249.if \n(mo-11 .ds MO December 1250.if \n(dw-0 .ds DW Sunday 1251.if \n(dw-1 .ds DW Monday 1252.if \n(dw-2 .ds DW Tuesday 1253.if \n(dw-3 .ds DW Wednesday 1254.if \n(dw-4 .ds DW Thursday 1255.if \n(dw-5 .ds DW Friday 1256.if \n(dw-6 .ds DW Saturday 1257.ds DY \*(MO \n(dy, 19\n(yr 1258.IZ 1259.rm IZ 1260.rm MO 1261.de FN 1262.FS 1263.. 1264. \"FS - begin footnote 1265.de FJ 1266'ce 0 1267.ev1 1268.ll \\n(FLu 1269.da FF 1270.br 1271.if \\n(IF>0 .tm Footnote within footnote-illegal. 1272.nr IF 1 1273.if !\\n+(XX-1 .FA 1274.. 1275. \"FE - footnote end 1276.de FK 1277.br 1278.in 0 1279.nr IF 0 1280.di 1281.ev 1282.if !\\n(XX-1 .nr dn +\\n(.v 1283.nr YY -\\n(dn 1284.if \\n(NX=0 .nr WF 1 1285.if \\n(dl>\\n(CW .nr WF 1 1286.if (\\n(nl+\\n(.v)<=(\\n(.p+\\n(YY) .ch FO \\n(YYu 1287.if (\\n(nl+\\n(.v)>(\\n(.p+\\n(YY) .if \\n(nl>(\\n(HM+1.5v) .ch FO \\n(nlu+\\n(.vu 1288.if (\\n(nl+\\n(.v)>(\\n(.p+\\n(YY) .if \\n(nl+\\n(FM+1v>\\n(.p .ch FX \\n(.pu-\\n(FMu+2v 1289.if (\\n(nl+\\n(.v)>(\\n(.p+\\n(YY) .if \\n(nl<=(\\n(HM+1.5v) .ch FO \\n(HMu+(4u*\\n(.vu) 1290.. 1291.\" First page footer. 1292.de FS 1293.ev1 1294.br 1295.ll \\n(FLu 1296.da FG 1297.. 1298.de FE 1299.br 1300.di 1301.nr FP \\n(dn 1302.if \\n(1T=0 .nr KG 1 \"not in abstract repeat next page. 1303.if "\\n(.z"OD" .nr KG 0 \" if in OK, don't repeat. 1304.ev 1305.. 1306.de FA 1307.if n __________________________ 1308.if t \l'1i' 1309.br 1310.. 1311.de FV 1312.FS 1313.nf 1314.ls 1 1315.FY 1316.ls 1317.fi 1318.FE 1319.. 1320.de FX 1321.if \\n(XX>0 .di FY 1322.if \\n(XX>0 .ns 1323.. 1324.de XF 1325.if \\n(nlu+1v>(\\n(.pu-\\n(FMu) .ch FX \\n(nlu+1.9v 1326.ev1 1327.nf 1328.ls 1 1329.FF 1330.rm FF 1331.nr XX 0 1 1332.br 1333.ls 1334.di 1335.fi 1336.ev 1337.. 1338.de FL 1339.ev1 1340.nr FL \\$1n 1341.ll \\$1 1342.ev 1343.. 1344.de HO 1345Bell Laboratories 1346Holmdel, New Jersey 07733 1347.. 1348.de WH 1349Bell Laboratories 1350Whippany, New Jersey 07981 1351.. 1352.de IH 1353Bell Laboratories 1354Naperville, Illinois 60540 1355.. 1356.de UL \" underline argument, don't italicize 1357.if t \\$1\l'|0\(ul'\\$2 1358.if n .I \\$1 \\$2 1359.. 1360.em EM 1361. \" ACCENTS say \*'e or \*`e to get e acute or e grave 1362.ds ' \h'\w'e'u*4/10'\z\(aa\h'-\w'e'u*4/10' 1363.ds ` \h'\w'e'u*4/10'\z\(ga\h'-\w'e'u*4/10' 1364. \" UMLAUT \*:u, etc. 1365.ds : \v'-0.6m'\h'(1u-(\\n(.fu%2u))*0.13m+0.06m'\z.\h'0.2m'\z.\h'-((1u-(\\n(.fu%2u))*0.13m+0.26m)'\v'0.6m' 1366. \" TILDE and CIRCUMFLEX 1367.ds ^ \\k:\h'-\\n(.fu+1u/2u*2u+\\n(.fu-1u*0.13m+0.06m'\z^\h'|\\n:u' 1368.ds ~ \\k:\h'-\\n(.fu+1u/2u*2u+\\n(.fu-1u*0.13m+0.06m'\z~\h'|\\n:u' 1369. \" czech v symbol 1370.ds C \\k:\\h'+\\w'e'u/4u'\\v'-0.6m'\\s6v\\s0\\v'0.6m'\\h'|\\n:u' 1371.ds v \\k:\\h'+\\w'e'u/4u'\\v'-0.6m'\\s6v\\s0\\v'0.6m'\\h'|\\n:u' 1372. \" cedilla 1373.ds , \\k:\\h'\\w'c'u*0.4u'\\z,\\h'|\\n:u' 1374.de [] 1375.][ \\$1 1376.. 1377.de ][ 1378.if \\$1>5 .tm Bad arg to [] 1379.[\\$1 1380.. 1381.if n .ds [. [ 1382.if t .ds [. \s-2\v'-.4m'\f1 1383.if n .ds .] ] 1384.if t .ds .] \v'.4m'\s+2\fP 1385.if n .ds [o "" 1386.if n .ds [c "" 1387.if t .ds [o `` 1388.if t .ds [c '' 1389.de [5 \" tm style 1390.FS 1391.IP "\\*([F.\0" 1392\\*([A, \\f2\\*([T\\f1, 1393.ie \\n(TN \\*([M. 1394.el Bell Laboratories internal memorandum (\\*([D). 1395.RT 1396.FE 1397.. 1398.de [0 \" other 1399.FS 1400.IP "\\*([F.\0" 1401.if !"\\*([A"" \\*([A, 1402.if !"\\*([T"" \\f2\\*([T\\f1\c 1403.if !"\\*([T"" .if !"\\*([O"" ,\ 1404.ie !"\\*([O"" \\*([O 1405.el .if !"\\*([T"" \&. 1406.if !"\\*([D"" \\*([D. 1407.RT 1408.FE 1409.. 1410.de [1 \" journal article 1411.FS 1412.IP "\\*([F.\0" 1413\\*([A, 1414.if !"\\*([T"" \\*([o\\*([T,\\*([c 1415.if "\\*([V"" \\f2\\*([J\\f1, 1416.if !"\\*([V"" \\f2\\*([J\\f1 1417.if !"\\*([V"" \{.if n Vol.\& 1418\\f3\\*([V\\f1\c\} 1419.if !"\\*([N"" (\\*([N)\c 1420.if !"\\*([P"" \{\ 1421.ie \\n([P>0 \ pp.\& 1422.el \ p.\& 1423\\*([P\} 1424.if !"\\*([I"" .if "\\*([R"" \\*([I, 1425(\\*([D). 1426.if !"\\*([O"" \\*([O 1427.RT 1428.FE 1429.. 1430.de [2 \" book 1431.FS 1432.IP "\\*([F.\0" 1433\\*([A, \\f2\\*([T,\\f1 1434\\*([I\c 1435.if !"\\*([C"" , \\*([C\c 1436 (\\*([D). 1437.if !"\\*([G"" Gov't. ordering no. \\*([G 1438.if !"\\*([O"" \\*([O 1439.RT 1440.FE 1441.. 1442.de [4 \" report 1443.FS 1444.IP "\\*([F.\0" 1445\\*([A, \\*([o\\*([T,\\*([c 1446\\*([R\c 1447.if !"\\*([G"" \& (\\*([G)\c 1448.if !"\\*([I"" , \\*([I\c 1449.if !"\\*([C"" , \\*([C\c 1450 (\\*([D). 1451.if !"\\*([O"" \\*([O 1452.RT 1453.FE 1454.. 1455.de [3 \" article in book 1456.FS 1457.IP "\\*([F.\0" 1458\\*([A, \\*([o\\*([T,\\*([c 1459.if !"\\*([P"" pp. \\*([P 1460in \\f2\\*([B\\f1, \c 1461.if !"\\*([E"" ed. \\*([E,\c 1462.if !"\\*([I"" \\*([I\c 1463.if !"\\*([C"" , \\*([C\c 1464 (\\*([D). 1465.if !"\\*([O"" \\*([O 1466.RT 1467.FE 1468.. 1469.de [< 1470.]< 1471.. 1472.de ]< 1473.SH 1474References 1475.LP 1476.rm FS FE 1477.. 1478.de [> 1479.]> 1480.. 1481.de ]> 1482.sp 1483.. 1484.de [- 1485.]- 1486.. 1487.de ]- 1488.rm [V [P [A [T [N [C [B [O [R [I [E [D 1489.. 1490.de UX 1491.ie \\n(GA>0 \\$2\s-2UNIX\s0\\$1 1492.el \{\ 1493.if n \\$2UNIX\\$1* 1494.if t \\$2\s-2UNIX\\s0\\$1\\f1\(dg\\fP 1495.FS 1496.if n *UNIX 1497.if t \(dgUNIX 1498.ie \\$3=1 is a Footnote of Bell Laboratories. 1499.el is a Trademark of Bell Laboratories. 1500.FE 1501.nr GA 1\} 1502.. 1503.de US 1504the 1505.UX 1506operating system 1507.. 1508.de QS 1509.br 1510.in +\\n(QIu 1511.ll -\\n(QIu 1512.LP 1513.. 1514.de QE 1515.br 1516.ll +\\n(QIu 1517.in -\\n(QIu 1518.LP 1519.. 1520.de B1 \" begin boxed stuff 1521.br 1522.di BB 1523.nr BC 0 1524.if "\\$1"C" .nr BC 1 1525.nr BE 1 1526.. 1527.de B2 \" end boxed stuff 1528.br 1529.nr BI 1n 1530.if \\n(.$>0 .nr BI \\$1n 1531.di 1532.nr BE 0 1533.nr BW \\n(dl 1534.nr BH \\n(dn 1535.ne \\n(BHu+\\n(.Vu 1536.nr BQ \\n(.j 1537.nf 1538.ti 0 1539.if \\n(BC>0 .in +(\\n(.lu-\\n(BWu)/2u 1540.in +\\n(BIu 1541.BB 1542.in -\\n(BIu 1543.nr BW +2*\\n(BI 1544.sp -1 1545\l'\\n(BWu\(ul'\L'-\\n(BHu'\l'|0\(ul'\h'|0'\L'\\n(BHu' 1546.if \\n(BC>0 .in -(\\n(.lu-\\n(BWu)/2u 1547.if \\n(BQ .fi 1548.br 1549.. 1550.de AT 1551.nf 1552.sp 1553.ne 2 1554Attached: 1555.. 1556.de CT 1557.nf 1558.sp 1559.ne 2 1560.ie \\n(.$ Copy to \\$1: 1561.el Copy to: 1562.. 1563.de BX 1564.if t \(br\|\\$1\|\(br\l'|0\(rn'\l'|0\(ul' 1565.if n \(br\\kA\|\\$1\|\\kB\(br\v'-1v'\h'|\\nBu'\l'|\\nAu'\v'1v'\l'|\\nAu' 1566.. 1567