-ana aaaa aaab aaac aaan aaar aaba aabb aabc aaca aacb aacc aacn aacr aana aang aara aarc abaa abab abac abag aban abar abb- abba abbb abbr abca abcb abcc abcn abcr abra abrc acaa acab acac acag acan acar acba acca accc acga acgr acr- acra acrc acrr agac agag agan agar agba agca agcc agga agna agra ana- anaa anab anac anag anan anar anba anbb anca ancc ang- anga anna annb anrc arab arac arag aran arar arba arc- arca arga argb arna arng arr- arra arrc arrg arrr baaa baan baar baba babb babr bac- baca bacc bacn baga bagg bagn bana banc bang bann banr bar- bara barb barc barg barn barr bbbb bbga bbng bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcra bgan bgca bnrr brab brac brag bran brca brcb brna brrr caaa caab caac caan caba cabg cac- caca cacc cacr caga cagg cagn cagr cana canc cang cann cara carb carc carn carr cbac cbar cbbc cbca cbcc cbcn cbcr cbga cbgb cbna cbrn ccaa ccab ccac ccag ccar ccba ccbc ccbn ccca cccb cccc ccga ccgc ccna ccnb ccnc ccnr ccra ccrc ccrg cgac cgcc cgcg cnaa cnac cnag cnbc cnna cnrc cnrr crab crac crag cran crar crbc crca crcc crcr crna gaar gaba gabb gabr gaga gagg gana ganc gang gann gara garb garg garn garr gbag gban gc-c gcaa gcbc gccc gcna gcrg gggg ggrn gnaa gnac gnar gncc gngc gnrc gnrr grab grac gran grbr grcc grrr naaa naab naac naag naan naar naba nabc naca nacc naga nagc nan- nana nanb nang nann nara narc narg narn narr nbaa nbar nbbc nbca nbcc ncaa ncac ncar ncba ncbc ncca nccc nccn nccr ncga ncgr ncna ncnc ncra ncrc ngab ngac ngan nngn nnnn nrab nrca nrna nrrc raab raag raan raba rabb rac- raca racc raga ragg rana ranc rang rann rara rarb rbbb rbbr rcac rcbc rccb rccc rcga rcgc rcnr rcrg rgan rgba rnag rnbr rrna rrrr