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<?php function getNewLetter(string $letter, int $number): string { $newOrd = (ord($letter) + $number - 65) % 26; if ($newOrd < 0) { $newOrd += 26; } return chr(65 + $newOrd); } echo getNewLetter("H", 4); echo getNewLetter("H", 26); echo getNewLetter("H", -32);
Output for git.master, git.master_jit, rfc.property-hooks
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