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  1. or download this
    my $Str = 'äöüÄÖÜß' . "\n";
  2. or download this
    use v5.14;
use warnings;
...
#warn sprintf "%vX", $str;  # E4.F6.FC.C4.D6.DC.DF

say $str;
  3. or download this
    use v5.14;
use warnings;
...
#warn sprintf "%vX", $str;  # E4.F6.FC.C4.D6.DC.DF

say $str;
  4. or download this
    >chcp
Active code page: 65001   # My machine use UTF-8 for the console.
...

>perl -Mv5.14 -ne"say sprintf '%vX', $_" a
C3.A4.C3.B6.C3.BC.C3.84.C3.96.C3.9C.C3.9F.A   # UTF-8 of äöüÄÖÜß