a-ha aaaa aaab aaac aaah aaba aabb aabc aabh aaca aacb aacc aach aagh aaha abaa abab abac abag abb- abba abbb abca abcb abcc abch abha acaa acab acac acag acba acca accc acch acga acha achh agac agag agba agca agcc agga agha ahab ahac ahah ahha baaa baah baba babb bac- baca bacc bach baga bagg bagh baha bbbb bbch bbga bcaa bcbc bcbg bcca bccc bgca bhag bhca bhcc caaa caab caac caah caba cabg cac- caca cacc cach caga cagg caha cbac cbbc cbca cbcc cbga cbgb cbha ccaa ccab ccac ccag ccba ccbc ccca cccb cccc ccga ccgc ccha cgac cgcc cgcg chaa chab chac chag chah chca chch chgb chha gaba gabb gach gaga gagg gaha gbag gc-c gcaa gcbc gccc gggg gghg haab haag haba hag- haga hagg hagh haha hbag hcbc hcca hccb hccc hcch hcgh hgah hggc hhaa hhgg hhhh