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  1. or download this
      use utf8;   # Required if using Unicode strings.
  ...
  open(FH, "<:encoding(UTF-8)", "$fileName") ||
    die "Can't open $fileName: $!\n";
  2. or download this
      print "Three required utf8 chars:\n \x{B0}\n \x{2032}\n \x{2033}\n";
  print chr(0xB0), "\n";
  3. or download this
      Three required utf8 chars:
   °
   &#8242;
   &#8243;
  ?