<?php function power($s) { return array_sum(array_map(function($e) { return ord($e) - 64; }, str_split($s))); } function battle($x, $y) { $l = power($x); $m = power($y); return ($l > $m) ? $x : ($l == $m) ? "Tie!" : $y; } echo battle("FOUR", "FIVE");
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