a-be aaaa aaab aaac aaad aaae aaaf aaba aabb aabc aabd aaca aacb aacc aacd aace aacf aada aadc aade aaea aaec aafa aafb aafc aafd aaff aage abaa abab abac abad abae abaf abag abb- abba abbb abbe abca abcb abcc abcd abcf abda abec abed abee abff abgd acaa acab acac acad acae acag acba acca accc accd acce accf acda acdb acdc acde acdf ace- acea acec aced acfc acfd acfe acga adaa adab adac adad adae adag adba adbc adcc adda addc addd adde adea adeb adee adfa adfc aeac aeaf aecb aede aega afaa afad afca afcb afcc afdb afdc afee affa affc afgf agac agad agag agba agca agcc agce agda agde agea aged agee agfa agga agge baaa baad baaf baba babb babe bac- baca bacc bace bada badb badd bade baed bafc baff baga bage bagg bbad bbbb bbdd bbeb bbfc bbga bcaa bcbc bcbg bcca bccc bcda bcde bcec bcfc bdbc bddc bead beaf beag beba bebb bebe beca beda bede beeb beed beef beeg befa befe beff bega begg bfca bfgf bgca bgfc c-cd caaa caab caac caaf caba cabe cabf cabg cac- caca cacc cace cada cadc cadd cade caec cafa cafb cafc cafe caff caga cage cagg cbac cbbc cbca cbcc cbce cbdb cbdc cbea cbec cbee cbef cbfb cbfc cbga cbgb ccaa ccab ccac ccad ccaf ccag ccba ccbc ccca cccb cccc cccf ccdc ccdf cced ccee ccfa ccfc ccfd ccff ccga ccgc cd-e cdaa cdac cdad cdba cdbf cdda cddb cdec cdef cdfa cdfe ceac cead ceba cec- ceca cece ceda cedd cede ceeb ceec cef- cefa cefc cege cfaa cfab cfac cfae cfbc cfca cfcb cfcf cfda cffb cgac cgcc cgcg cged cgfc daab daad daae daag daba dabb daca dace dada dade daeb dafa dafc dafe daff daga dage dagg dbag dbcc dbfc dcbc dcca dccb dccc dcdb dcfc dddd deac dead deae deaf deba debe dec- deca decc decd dece deda dedd dede deeb deed deef deeg defe deff defg dega dege dfaf dfcc dffa dgac dgca dgeg dgge eaaf eaba eaca eacc eada eadb eadd eaec eafb eaga eage ebac ebba ebbc ebcc ebed ebfc ecaa ecac ecad ecbc ecbe ecca eccb eccc ecce ecdc ecdf eced ecef ecfa ecfc edac edad edag edca edda eddc edde ede- edea edfa edge eeca eede eeea eeee eefa eefe eega ef-g efab efca efda effa egaa egad egae egba egbe egcc egcg egea egec egee eggb egge faaa faac faad faba fabd fabe faca facc face fada fadd fade faeb fafa fafc fafe faff fafg fage fagg fcab fcba fcca fccf fcda fdca fead feaf feba fece feda fede feeb feed fefc fefe feff fege fegg ffcc ffee ffff gaba gabb gabe gace gada gadd gade gaea gaec gaed gafa gafb gafc gaff gaga gage gagg gbag gbde gbfc gc-c gcaa gcbc gccc gccf gcda gcfc gdca gddb geab gead geba gebe geca gece geda gedd gede geed gefe gege gegg gfcf gffa ggfg gggg