Where you have: 
 open INPUT, "$i" or die "Couldn't open the file. $!";

[download]
you may want to say open INPUT, "< $i", or better yet open INPUT, "<", $i instead in case you get files beginning with |, <, or >

In reply to Re: Using expressions in arrays for pattern matching by ysth
in thread Using expressions in arrays for pattern matching by Mike_76

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