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<?php $str = <<<STR THEDLSDARNVNS CCVBXXMTGFRWS CVIYTVBVSDOPTR VBNMAITYSURFD MOTYYERSAWERTY MOITRUHDYRTBDI VNOWUNMBORN STR; $str = preg_replace("/\s|\n/", "", $str); $fib = [1, 2, 3, 5, 8, 13]; foreach ($fib as $pos) { echo substr($str, $pos, 1); }

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41.9 ms | 402 KiB | 5 Q