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#hex dump of A
#00000000  41                                                |A|
#00000001

#hex dump of HIRAGANA LETTER A
#00000000  e3 81 82                                          |...|
#00000003

#Example 1: native string may not be native string
#Code: $native_string=pack('W*', unpack('U*', $unicode_string));
...
    Dump $unicode_string;
    Dump $native_string;  # ==> this is UTF8 flaged  may be transparen
+tly upgraded because code point > 255
    Dump $native_string2;

#Example 2: it is not bytes, it is array of code point.
#Code: @bytes=unpack("C*", $unicode_string);
...
    @bytes=map{ sprintf("%X",$_) } unpack("C*", Encode::encode('utf8',
+$unicode_string));
    print join('|', @bytes), "\n";