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040000 tree c74d5403d78c771633415cf4af4068afcd2473e1	linewriter
040000 tree 5f560a8df15104c77b96f9d799465f155dbe7c32	log
040000 tree dbb014a3e86ced75f8e274465abe215ad692b4f9	rand
040000 tree a30acdc78c184df6e12a23808eaa9bfacd08b04d	sleep
040000 tree ebd6ec1ba7c9e5756443baa03045e742915c9dd4	state
040000 tree c810154ede74a4c197b06e2fb61fecb4a67673fd	sync
040000 tree 1660ff5a49e0c650b9226507ac37a0e546d9efd9	tcpip
040000 tree 8a9d6b8bf5064eda830da3e64434fd32e1c79335	waiter