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<?php function x($n) { for($i = 1; $i <= $n; $i++) { $n % $i == 0 && $i != $n ? $factors[]=$i & $i!=$n : 0; } array_sum($factors) == $n ? printf('P') : printf('I'); } x(28);
Output for git.master, git.master_jit, rfc.property-hooks
I

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