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<?php preg_match_all('/^(([a-z])+.)+[A-Z]([a-z])+$/', str_repeat("a", 30)."!", $result); print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( ) [1] => Array ( ) [2] => Array ( ) [3] => Array ( ) )

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