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  1. or download this
    my %conv = ( '*' => '?', '?' => '#' );
my $conv = quotemeta(join('', keys(%conv)));
...
}

print($result, "\n");
  2. or download this
    my $string = 't?e\\\\xt\\\\* with escapes\\*';

...
}

print($result, "\n");
  3. or download this
    my $string = 't?e\\\\xt\\\\* with escapes\\*';

...
}

print($result, "\n");