040000 tree 3acf3d993fcb305a293ce672f593b0afcac3289d	concepts
040000 tree 52710c44c635e6aa82aa068865c29a677e18e4ff	format
040000 tree de61fbf4a4ad8ca4d8bf4536dd1d8e22223f6039	memory
040000 tree 81c3ae95690362ffbc0ddeab0a23603fa5f7e915	ranges
040000 tree 3813934e34ae20d4a12417dfe37012c3ccf83ecd	text_encoding
040000 tree 697665e6ebc1e58f65357fe9e521a3b4720b9d26	time