in reply to Re^4: Vowel search
in thread Vowel search

foreach $file(@lines);

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is an invalid statement. See Foreach Loops in perlsyn. You likely mean 
foreach $file(@lines) {
    ...
}

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#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

In Section Seekers of Perl Wisdom