040000 tree 539e330c21650bff7e592a3bc398cd7236fb026f	complex
040000 tree 9dd8d23886b8bf79722e845a87cf7da3caa6f58e	nested
040000 tree 2690b24c6b145c7765401ff0ce5d900c34021aa6	scaling
040000 tree 93142c29c1d9677fbe8c6e3df7dd2001d14ab279	simple