-ana a-ha aaaa aaab aaac aaaf aaah aaan aaba aabb aabc aabh aaca aacb aacc aacf aach aacn aafa aafb aafc aaff aaha aana abaa abab abac abaf aban abb- abba abbb abca abcb abcc abcf abch abcn abff abha acaa acab acac acan acba acca accc accf acch acfc acha achh afaa afan afca afcb afcc afch affa affc ahab ahac ahah ahfa ahha ana- anaa anab anac anah anan anba anbb anca ancc anfa anha anna annb baaa baaf baah baan baba babb bac- baca bacc bach bacn bafc baff baha bahn bana banc banh bann bbbb bbch bbfc bbfn bcaa bcbc bcca bccc bcfc bfca bhan bhca bhcc bhff caaa caab caac caaf caah caan caba cabf cac- caca cacc cach cafa cafb cafc caff caha cahn cana canc canh cann cbac cbbc cbca cbcc cbcn cbfb cbfc cbha cbna ccaa ccab ccac ccaf ccba ccbc ccbn ccca cccb cccc cccf ccfa ccfc ccff ccha ccna ccnb ccnc ccnf cfaa cfab cfac cfbc cfbn cfca cfcb cfcf cfcn cffb cfnb chaa chab chac chaf chah chan chca chch chfa chfc chha chnb chnc cnaa cnac cnbc cnfa cnna faaa faac faah faan faba faca facc fach fafa fafc faff faha fahn fana fanc fcab fcba fcca fccf fcch ffcc ffff fnac haab haaf haan haba hafb haff haha hahn hana hanc hann hbfc hcbc hcca hccb hccc hcch hcfa hcfc hfba hhaa hhhh hnna naaa naab naac naan naba nabc nabf naca nacc nacf nach nafa nafc naff naha nahf nan- nana nanb nann nbaa nbaf nbbc nbca nbcc nbfa nbfc ncaa ncac ncba ncbc ncca nccc nccf nccn ncfc ncha nchc ncna ncnc nfaa nfff nhcc nhnn nnnn