I'm making a "wordlist maker" which takes input from a text file, takes off all of the non-alphanumeric chars (!,?,@,etc) and then writes all of the words with 5 characters or more into a file. I made this code, and I would like to know how to improve it, since i'm new in Perl: 
$file = join('',<>);
$file =~ s/\n/ /g;
$file =~ s/ +/ /g;
@file = split(' ',$file);
foreach $word (@file) {
    $word =~ s/[\!\@\#\$\%\^\&\*\(\)\_\+\=\|\\\~\`\[\]\{\}\:\;\'\"\,\.
+\<\>\/\?1-9]//g;
    (length($word)>=5)?$wordlist{lc($word)}=1:next;
}
open(LIST,">wordlist.txt");
foreach $word (keys %wordlist) {
    $i++;
    print LIST "$word\n";
}
close(LIST);
print "$i words found. Saved in wordlist.txt\n";

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In reply to Wordlist maker by Anonymous Monk

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