040000 tree 7cf93bd33c495d88b36518cc1faca0c5c88ce7e6	re.alg.match
040000 tree 20e0110ef0c8c9c85761684bb66cda1de628977d	re.alg.replace
040000 tree 5314662d0de4edb13b56286af5f70e1869867bb5	re.alg.search
040000 tree 3b6b0e6627e5b8492f5920ca783ef97de29b12b6	re.except