use utf8;   # Required if using Unicode strings.
  ...
  open(FH, "<:encoding(UTF-8)", "$fileName") ||
    die "Can't open $fileName: $!\n";

##</code><code>##

  print "Three required utf8 chars:\n \x{B0}\n \x{2032}\n \x{2033}\n";
  print chr(0xB0), "\n";

##</code><code>##

  Three required utf8 chars:
   °
   &#8242;
   &#8243;
  ?