if ( /%[0-9A-Fa-f]{2}/ ) {
            # 1.
            # my $escaped = uri_unescape( $_ ); same effect as the RE but slower
            s/%([0-9A-Fa-f]{2})/chr(hex($1))/eg;
            # 2.
            my $s = decode_utf8( $_ );
            # 3.
            $s = encode("iso-8859-1", $s);
            push @new_words, $s;
        } else {
            push @new_words, $_;
        }