040000 tree 88e043528bea52e66b16b9fda2b0dfa560c25ded	by_chapter
040000 tree 8c09a444f3eafe504c5ac7870a44f3a35ba2ff3f	by_name
040000 tree a54a06a8c431085e5bcf5e1991e2db80887d4b62	files
100644 blob 75fb32260853536c26c2d31fbe9d8655895f246d	iuh-notes.txt