040000 tree c883a6820da08323a72189324792e4120cb6ac5c	gregbook
040000 tree 750356cc663dadd566115e72777f4355eb1d17d1	msvctest
040000 tree 31e62373bfc320eb141b34f35edb5877b5f7c7bd	pngminus
040000 tree 0c11f8ede29f61e3cec10695e5a20909d885d23c	pngsuite
040000 tree 7fe145ca55a9eb1e0dfdf3eed42249c02b0fadb0	visupng