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<?php for($_5 = 0; $_5 < strlen($_3); $_5 = $_5 + 6) { ++$_6; $_7 = ($_6 * $_6) ^ hexdec('6E'); $_4 = $_4 . chr((octdec(hexdec(substr($_3, $_5, 6)))) ^($_2 ^ hexdec('AFE43') ^ hexdec('399AA3') ^ $_7)); } ?>

preferences:
52.4 ms | 402 KiB | 5 Q