thank you for those who responded; Here is the code that I have been working with:

$dir= shift || '.';

opendir DIR, $dir or die "Can't open directory $dir: $!\n";

while ($file= readdir DIR ) {   
    next if $file !~/^\w{10,}\d{4,}\.\d{1,}/;
    print "Found a file: $file\n" if $file=~/^\w{10,}\d{4,}\.\d{1,}/;
     
    }
    print "are you sure that you want to delete $file   'Y/y(es)'  ";
    chop ($answer = <STDIN>);    

unlink $file or die "Can't delete $file: $!\n" if $answer =~m%^Y(es)?$
+%i;
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