----- test: cut -f 1 -s d_cut.in -----
12

qwe
----- test: cut -f 2 -s d_cut.in -----
34
12

----- test: cut -f 3 -s d_cut.in -----
56

rty
----- test: cut -f 1-2 -s d_cut.in -----
12	34
	12
qwe	
----- test: cut -f 2,3 -s d_cut.in -----
34	56
12	
	rty
----- test: cut -f 4 -s d_cut.in -----

34
uio
----- test: cut -f 1-3,4-7 -s d_cut.in -----
12	34	56
	12		34	56
qwe		rty	uio	p[]	asd	
----- test: cut -f 1,2-7 -s d_cut.in -----
12	34	56
	12		34	56
qwe		rty	uio	p[]	asd