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$str = pack('C*',48,49,50,51,52);
print "$str\n";
@chars = unpack('C*',$str);
print join(', ',@chars),"\n";

012345
48, 49, 50, 51, 52

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print map { my ($m)=1<<hex($_)&11?' ':'';
$m.=substr('AHJPacehklnorstu',hex($_),1) }
split //,'2fde0abe76c36c914586c';