-ana a-ha aaaa aaab aaac aaaf aaah aaan aaar aaba aabb aabc aabh aaca aacb aacc aacf aach aacn aacr aafa aafb aafc aaff aaha aana aara aarc abaa abab abac abaf aban abar abb- abba abbb abbr abca abcb abcc abcf abch abcn abcr abff abha abhr abra abrc acaa acab acac acan acar acba acca accc accf acch acfc acha achh achr acr- acra acrc acrr afaa afan afar afca afcb afcc afch affa affc afr- afra afrc ahab ahac ahah ahar ahfa ahha ahra ahrc ahrr ana- anaa anab anac anah anan anar anba anbb anca ancc anfa anha anna annb anrc arab arac araf arah aran arar arba arbh arc- arca arch arfa arfb arfc arff arh- arna arr- arra arrc arrh arrr baaa baaf baah baan baar baba babb babr bac- baca bacc bach bacn bafc baff baha bahn bahr bana banc banh bann banr bar- bara barb barc barf barh barn barr bbbb bbch bbfc bbfn bbrc bcaa bcar bcbc bcca bccc bcfc bcra bfca bhan bhar bhca bhcc bhff bhra bnrr brab brac braf brah bran brca brcb brfc brna brrr caaa caab caac caaf caah caan caba cabf cac- caca cacc cach cacr cafa cafb cafc caff caha cahn cana canc canh cann cara carb carc carf carn carr cbac cbar cbbc cbca cbcc cbcn cbcr cbfb cbfc cbha cbna cbrh cbrn ccaa ccab ccac ccaf ccar ccba ccbc ccbn ccca cccb cccc cccf ccfa ccfc ccff ccha cchr ccna ccnb ccnc ccnf ccnr ccra ccrc ccrf cfaa cfab cfac cfar cfbc cfbn cfbr cfca cfcb cfcf cfcn cffb cffr cfnb cfnr cfra cfrb cfrn chaa chab chac chaf chah chan char chca chch chfa chfc chfr chha chnb chnc chnr chra chrb chrc chrf chrn chrr cnaa cnac cnbc cnfa cnna cnrc cnrr crab crac craf cran crar crbc crca crcc crcr crfc crna faaa faac faah faan faba faca facc fach fafa fafc faff faha fahn fahr fana fanc fara farb farc farr fbar fcab fcar fcba fcca fccf fcch fcra ffar ffcc ffff ffrr fnac fnar frab frac fran frbc frcc frcn frfc haab haaf haan haar haba hafb haff haha hahn hana hanc hann hara harc harf harh harn harr hbar hbfc hcbc hcca hccb hccc hcch hcfa hcfc hfba hhaa hhhh hnna hrac hran hrfc hrrc naaa naab naac naan naar naba nabc nabf naca nacc nacf nach nafa nafc naff naha nahf nahr nan- nana nanb nann nara narc narf narh narn narr nbaa nbaf nbar nbbc nbca nbcc nbfa nbfc ncaa ncac ncar ncba ncbc ncca nccc nccf nccn nccr ncfc ncha nchc ncna ncnc ncra ncrc nfaa nfff nfra nhcc nhnn nhra nhrc nnnn nrab nrca nrfc nrna nrrc raab raaf raan raba rabb rac- raca racc rach rafa rafc raff raha rahn rahr rana ranc rann rara rarb rarf rbaf rbbb rbbr rcac rcaf rcbc rccb rccc rcfc rchb rcnr rffc rnaf rnbr rrah rrfc rrna rrrr