040000 tree 1218d32adbb889c9a869a9a293b4ea0c588c83d1	distribution
040000 tree d954cb42d698040902f30646111413c3e7cb28df	fitting
040000 tree c85b8cd541aec0aaa3916e1f8e987f6213b1feeb	linear
040000 tree fa8907fd652c301e2d9f65de4fcf9250690dc10a	optim
040000 tree 7698bdbb30cadc4f589159e24b4a310ae517616a	random
040000 tree c3b0ece2a5af7c549ad268b3771fcb9a66ccbf7d	stat