This would be real easy with a database like Oracle that supports hierarchical queries. In other databases, it would result in a query per generation which wouldn't be too efficient.

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