IMHO, I'm not sure what you're trying to achieve here, but here are a few pointers:

• Always  use strict;
• Why confuse yourself with the ARGuments? Why not use $ARGV[0], $ARGV[1]..etc?
• open FH, '<', '<path of file>';
• Why are you appending a file handle ($outfile)with  $sl ?
• Indent

Update:Use split;

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