dog,cat,horse,bird
sheep,cow
fish,mouse,rat,tiger,lion

##</code><code>##

#!/usr/bin/perl -w
use strict;
#!/usr/local/bin/perl
open (MYFILE, 'test2.txt');
while (<MYFILE>) 
 {
  chomp;
  $_ =~ s/,(?:"[^"\r\n]*"|[^,\r\n]*)$//m; 
  print "$_\n";
 }
close (MYFILE); 

##</code><code>##

dog,cat,horse
sheep
fish,mouse,rat,tiger

##</code><code>##

$_ =~ s/,(?:"[^"\r\n]*"|[^,\r\n]*)$//m; 

##</code><code>##

dog\cat\horse\bird
sheep\cow
fish\mouse\rat\tiger\lion

##</code><code>##

dog\cat\horse
sheep
fish\mouse\rat\tiger