040000 tree db424010d4c814f99269f1f9c6c169d9e9040a41	bouncing_ball
040000 tree 6e7dcf60a30e6e3ba7faa8d48fdf5d9f5dbe2c79	calculator
040000 tree 61042fd87434a866d0ce41a81dc88c01857786f7	hello_world
040000 tree e5efc153dc36b7c09267c14a6bb63f5d6a1d06e6	realm_builder
040000 tree fb20c9b2faf595c5aee1f078c26e8ae927841027	rot13