a-be aaaa aaab aaac aaae aaba aabb aabc aabt aaca aacb aacc aace aaco aact aaea aaec aage aaoe aaoo aata aatc aatt abaa abab abac abae abag abat abb- abba abbb abbe abbo abbt abca abcb abcc abct abec abee abet aboa abob aboo abot abta ac-t acaa acab acac acae acag acat acba acca accc acce acco acct ace- acea acec acet acga acoa acoe acog acot acta actc acte actg acto actt aeac aecb aect aega aeta aetc aeto aett ag-o agac agag agao agat agba agbo agca agcc agce agco agct agea agee aget agga agge agob agog agoo agot agta agte aoba aoca aoce aotc at-t ataa atab atac atae atat atca atcc atco atea atec atee ateo atgo atob atoc atoe atot atta atte atto baaa baat baba babb babe babo bac- baca bacc bace baco bact baga bage bagg bago bagt bata batc bate bato batt bbbb bbeb bbet bbga bcaa bcat bcbc bcbg bcca bccc bcec bcet bctc beag beat beba bebb bebe bebo beca beeb beeg beet bega begg bego beo- beot beta betc bete beto bett bgca boab boac boag boat boba bobb bobe bobo boca boce boco boea boec boee boeo boet boga boge bogg bogo bogt boob booc booe boog boot bota botb bote boto bott btaa btcc btec btob bttb c-bo caaa caab caac caat caba cabe cabg cabo cac- caca cacc cace caco caec caga cage cagg cago cat- cata catb catc cate cato catt cbac cbat cbbc cbca cbcc cbce cbct cbea cbec cbee cbet cbga cbgb cbot cbta cbtc ccaa ccab ccac ccag ccat ccba ccbc ccca cccb cccc ccee ccga ccgc ccgt ccob ccoc cctb cctc cctt ceac ceat ceba cec- ceca cece ceco cect ceeb ceec cege cego cet- ceta cete ceto cgac cgcc cgcg coag coat coba cobb cobe cobo coca coce coco coct cogo coob coot cota cotb cotc cote coto cott ctab ctae ctag ctba ctca ctec ctge ctot ctta eaba eaca eacc eaec eaga eage eata eate ebac ebba ebbc ebbo ebcc eboe eboo ecaa ecac ecao ecat ecbc ecbe ecca eccb eccc ecce ecco ecct eco- ecog ecot ect- ecta ectc ecto eeca eeea eeee eega eeoc eeta eetc eete egaa egae egao egat egba egbe egcc egcg egea egec egee eggb egge eggo ego- egot egta egte eota eotc eoto etag etat etbc etcc etco etec etee etoe etta ette etto gaba gabb gabe gabo gabt gace gaea gaec gaga gage gagg gago gata gatc gate gato gatt gbag gbbo gc-c gcaa gcat gcbc gccc gcet gcoa gctc geab geat geba gebe geca gece geet gege gegg gego geo- geog geta getb gete getg geto gett ggbt gggg goat goba gobe gobo goca goce goga gogo goog goot gota gote goto gott gtaa gtco gtea gtoe gtta o-eo oate obba obbo obea obec obet oboe obot ocab ocac ocat ocbc occa occc occt oce ocee ocet ocga oct- octa octe octo oec- oeca oecc oeec oegb oeta ogae ogb ogba ogbe ogea ogee ogge ogoa ogog ooaa ooba oobe oooo ootb otac otea otee oto- otoe otog otoo otta otte otto taa- taag taat taba tabb tabc tabe tabo taca tacc tace taco tact taec taga tage tagg tago taoa tata tatb tate tato tatt tbca tbcb tbcc tbce tbta tcca tccc tcga tctc teac teat teba tebo teca teco tect teec teet tega tegg tego tegt teta tete teto tett tgcc tgtc toab toat toba tobe tobo tobt toca toce toco toea toee toet toga toge togo togt tooa toot tota totc tote toto tott ttab ttbb tteo ttoe tttt