040000 tree ef036a37b486df73b7a62fa1f4ff593b13129cf5	get_sign
040000 tree 2cf909704b8c807ad6af05e9ecf80cc8964a8465	islower
040000 tree ac0bf395f9ce0bfc7faf01973dd8b39c2f88301e	regexp
040000 tree 46860266139abd354ff78dc756257298ba9fe51f	sort