1----- test: cut -f 1 -s d_cut.in -----
212
3
4qwe
5----- test: cut -f 2 -s d_cut.in -----
634
712
8
9----- test: cut -f 3 -s d_cut.in -----
1056
11
12rty
13----- test: cut -f 1-2 -s d_cut.in -----
1412	34
15	12
16qwe
17----- test: cut -f 2,3 -s d_cut.in -----
1834	56
1912
20	rty
21----- test: cut -f 4 -s d_cut.in -----
22
2334
24uio
25----- test: cut -f 1-3,4-7 -s d_cut.in -----
2612	34	56
27	12		34	56
28qwe		rty	uio	p[]	asd
29----- test: cut -f 1,2-7 -s d_cut.in -----
3012	34	56
31	12		34	56
32qwe		rty	uio	p[]	asd
33