040000 tree aa32c93fe7a0ad5fa92403a0fe1a96fcab467273	algorithms
040000 tree d0128b929628884fb1bcd69076c743ff3fd80eda	categories
040000 tree 57045711f52777c0d690570321d8c0e26801d650	common
040000 tree 4253f2389106724c9460821185ab2bc0b3fe5fb1	object