sub escape
{
  my $toencode = shift;
  return undef unless defined($toencode);
  $toencode=~s/([^a-zA-Z0-9_.-])/uc sprintf("%%%02x",ord($1))/eg;
  return $toencode;
}
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$_=$,=q,\,@4O,,s,^$,$\,,s,s,^,b9,s,
$_^=q,$\^-]!,,print
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