040000 tree efb210384210871f6a76bd8b9535ad9a74261dd0	email
040000 tree c0c23cdcefb5873328502428e0770c48eda4a32f	newer-than
040000 tree ece26d1377fc3411c751297d4db8d4e7a16e227b	older-than
040000 tree 093f7b718b6496fbb8922bc5b2f676294cac0e7d	username