<?php function search($input) { $result = $input; for($a=0;$a<count($input);$a++) { print "1"; } foreach($input as $a) foreach($input as $b) $result []= $a . $b; return array_filter(array_unique($result)); } print json_encode(search(["a", "b"])) . "\n"; print json_encode(search(["a", "b", "c"]));
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