-ana a-ha aaaa aaab aaac aaah aaan aaba aabb aabc aabh aaca aacb aacc aach aacn aaha aana abaa abab abac aban abb- abba abbb abca abcb abcc abch abcn abha acaa acab acac acan acba acca accc acch acha achh ahab ahac ahah ahha ana- anaa anab anac anah anan anba anbb anca ancc anha anna annb baaa baah baan baba babb bac- baca bacc bach bacn baha bahn bana banc banh bann bbbb bbch bcaa bcbc bcca bccc bhan bhca bhcc caaa caab caac caah caan caba cac- caca cacc cach caha cahn cana canc canh cann cbac cbbc cbca cbcc cbcn cbha cbna ccaa ccab ccac ccba ccbc ccbn ccca cccb cccc ccha ccna ccnb ccnc chaa chab chac chah chan chca chch chha chnb chnc cnaa cnac cnbc cnna haab haan haba haha hahn hana hanc hann hcbc hcca hccb hccc hcch hhaa hhhh hnna naaa naab naac naan naba nabc naca nacc nach naha nan- nana nanb nann nbaa nbbc nbca nbcc ncaa ncac ncba ncbc ncca nccc nccn ncha nchc ncna ncnc nhcc nhnn nnnn