040000 tree 9a3b47d88e596682553db579d06bc6a0e206f5bb	algorithms
040000 tree 4a71dfa67ed2416e76e3ed788f0a4c9f4dae592f	any
040000 tree ecf8352e3218a2a0170349291afa0ec48213bc91	containers
040000 tree 7be565ed3ca2f92dfb2a76afccc95f0f505d6423	utilities