040000 tree 5cd5462994ef52a634c01c40e97f2dfb253f6aaf	build
040000 tree 258d44b4f06bbe6aafe2d3c333a80c30f49a9406	it
040000 tree f1a7489d13aed97f09a8b213bb3468677ef12ba0	main
040000 tree fa0f8532404806961da60ef4714de6a8d954c14a	test