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

----- test: cut -f 2 -d : -s d_cut.in -----
34
rty
qwe
----- test: cut -f 3 -d : -s d_cut.in -----
56
uio

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

p[]

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