a-ak aaaa aaab aaad aaar aaba aabb aabd aabt aada aadt aaka aara aard aart aata aatk aatt abaa abab abad abak abar abat abb- abba abbb abbr abbt abda abra abta adaa adab adad adak adar adat adba adda addd addr adra adta akaa akar akka akr- akra arab arad arak arar arat arba arda arka arr- arra arrk arrr arrt arta artr at-t ataa atab atad atak atar atat atdt atka atkt atra atrk atta attr baaa baad baak baar baat baba babb babr bada badb badd badr bak- baka bakr bakt bar- bara barb bard bark barr bart bata batt bbad bbbb bbdd bd-r brab brad brak brat brda brdt brka brkb brrr btaa btdt btrt bttb daab daad daar daba dabb dabt dada daka dara darb dard dark darr dart data datr datt dbar dbtt dddd dkba draa drab drad drak drar drat drba drda drra dtaa kaaa kaab kaak kaar kaat kaba kabb kabd kabr kad- kada kadd kadr kadt kaka kakk kakt kara karb kard kark karr kart kat- kata katb katd katk katr katt kbaa kbab kbad kbak kbar kbat kbba kbbb kbbd kbbk kbbr kbbt kbdb kbdr kbkb kbkk kbkr kbra kbrb kbrd kbrk kbrt kbta kbtb kbtk kbtr kbtt kdaa kdab kdad kdak kdar kdat kdbb kdbr kddb kddd kddk kddr kdka kdkb kdkd kdkk kdkr kdkt kdrb kdta kdtd kdtr kkaa kkar kkat kkba kkbb kkbd kkbr kkbt kkda kkdd kkdt kkkk kkrb kkrk kkrr kkrt kktk krab krad krak krar krat krba krbb krbd krbk krbr krbt krda krdd krdr krka krkd krkk krkr krrb krrk krrr krrt krta krtk krtr ktaa ktak ktar ktat ktba ktbb ktbr ktbt ktdb ktdd ktdk ktdr ktkb ktkk ktkr ktkt ktrb ktrk ktrr ktrt kttk kttr kttt raab raad raak raat raba rabb rabk rada radd radr radt raka rakk rakt rara rarb rark rata ratk ratt rbbb rbbr rrad rrat rrrr rtdt taa- taar taat taba tabb tada taka takk takt tara tarb tard tark tarr tart tata tatb tatr tatt tbar tbrb tbta tddb tdkr tdra traa trab trad trak trat trra trtr ttab ttbb tttt