Select Code to Download

1:2:3:4
5:6:7:8
:9:10:11
12:13:14:15
:17:18:19

a:b:c:d:e
f:g:h:i:j
k:l:m:n:o
p:q:r:s:t
u:v:w:x:y

use File::Copy;
...
close(COL);
close(OUT);
copy("out.txt", "original.txt");

a:2:3:4
f:6:7:8
:9:10:11
k:13:14:15
:17:18:19