What he was giving you is called pseudocode. Basically, it means stating the solution as a series of steps in more-or-less plain english. This would then be translated by the programmer into source code.

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