1a. 2-a-b- 3-a-b - 4-a b- 5-a b- 6-a-b\- 7-a b\- 8-\-a b\- 9-\ a b\- 10-\-a b\- 11-\ a b\- 12argv[1] = <^A> 13argv[1] = <^A> 14argv[1] = <^?> 15argv[1] = <^?> 16argv[1] = <abcd> 171: x[A] y[B] z[] 181a: 192: x[A B] 20[A B ] 21[ A B ] 22==aa== 23==== 24==== 25argv[1] = < foo> 26argv[1] = < foo> 27argv[1] = <foo> 28argv[1] = < foo> 29argv[1] = <foo> 30argv[1] = <foo> 31argv[1] = < foo> 32a = abcdefg 33a = xyz 34a = -xyz 123- 35a = abc 36timeout 1: ok 37 38timeout 2: ok 39 40./read2.sub: line 36: read: -3: invalid timeout specification 411 42 43abcde 44./read3.sub: line 17: read: -1: invalid number 45abc 46ab 47abc 48# 49while read -u 3 var 50do 51echo "$var" 52done 3<$0 53argv[1] = <> 54argv[1] = <> 55argv[1] = <> 56FOO 57argv[1] = <> 58argv[1] = <3> 59argv[1] = <> 60argv[2] = <> 61argv[3] = <> 62FOO 630 0 0 640 650 661 67