040000 tree 3a1164002c1472e9700ae209f098d05a05915370	associative
040000 tree 293ca9f9becc8f58b99a8513bfb105952fae7f9a	gnu_cxx
040000 tree c09e90bb68e10209e498977f6fe684e389e0e9de	sequences
040000 tree 5ef9115082722f177dfce92b7b5f967a6714ed25	unord