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142.59 ms | 1399 KiB | 7 Q<?php
function f($n) {
echo $n . date("S", mktime(1,1,1,1,($n%100>10&&$n%100<20?$n:$n%10==0?10:$n%10)));
echo "\n";
}
f(11);
f(12);
f(15);
f(22);
f(40);
f(91);