040000 tree 5ccb8cc76f093bfddefa48a27add7385a8831037	cargo
040000 tree 895f3f049601d8e1fd1491869ca0f7b150829579	composites
040000 tree 83323312228e33f4b7889cfcd7d855e4fe557f6d	hello
040000 tree 7f7825db299456273d24184d7e27349b78c7d6cc	introduction
040000 tree 4258e482619d833c7bcd42b49ac5a69fbbdea94f	services