040000 tree 43ec99c5b35e2b8297bd213106f8f7c5ba2adeee	math
040000 tree ed7481701e243566b5d3f3474d92cb5b68ec563b	stdlib
040000 tree 9d28f766b226ff4b3ab733314da3c3a6fd0494c7	stdout
040000 tree 9e1b44c297fdbe6664be4f0565f29b0e3aecf42e	string
040000 tree 954af807d4d79e2ab906a50c2f3221fa7e790cce	time