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  1. or download this
    elsif ($option eq 'f') {
  print "Who are you looking for?\n";
  &find;
}
  2. or download this
    elsif ($option eq 'f') {
  print "Who are you looking for?\n";
...
  if (!&find($f)) {
      print "Name $f cannot be found in the directory.\n";
}
  3. or download this
    sub find {
   chomp(my $f = <STDIN>);
...
}   
      
  }
  4. or download this
    sub find {
    my $rc = 0;
...
            }
      }
}