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040000 tree 14cb46f0713c437e23760ff7bdca00a52db6890a	extension
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040000 tree 875f3a41f3c95a1361a3f427f5b0e5ff014b8841	hash
040000 tree 3bd949cfe49d6d465f2cead7efe72873491f9ac2	inheritance
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040000 tree 06beef1d5a0ac279153ebdd632886e3175f46889	memory
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040000 tree 74fde78e01c0d9ec70ff1ff9fe02a4be310f5656	multithread
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040000 tree 892be93ec496bc2f6950504e8ae3105a152f1905	trie