a-ak a-be a-ii aaaa aaab aaac aaae aaai aaar aaba aabb aabc aabi aaca aacb aacc aace aaci aack aacr aaea aaec aaib aaic aaii aaka aake aara aarc aare aari abaa abab abac abae abai abak abar abb- abba abbb abbe abbi abbr abca abcb abcc abci abcr abec abee aber abia abib abic abie abir abra abrc abri acaa acab acac acae acai acar acba acca accc acce acci ace- acea acec acek acer aci- acia acic acie acir acke acr- acra acrc acre acri acrr aeac aebi aecb aeci aeer aeka aer- aera aerc aeri aiai aiba aica aicc aice aicr aiea aiee aiia aiib aiic aiir aika aike aiki aira aire airi akaa akae akai akar akca akee aker akia akie akik akir akka akki akr- akra akre arab arac arae arai arak arar arba arbe arbi arc- arca arce arci area arec aree arei arek aria arib arie arii arik arka arke arki arr- arra arrc arre arri arrk arrr ba-i baaa baak baar baba babb babe babi babr bac- baca bacc bace baci back baek baer baia baib baic baie baik bair bak- baka bake baki bakr bar- bara barb barc bare bari bark barr bbbb bbci bbeb bbrc bcaa bcar bcbc bcca bccc bcci bcec bcer bcia bcie bcra beak bear beba bebb bebe bebi beca beci beck beeb beek beer beia beic beik beir beka beke beki bera berc bere beri berk berr biak biar biba bibb bibe bibi bica bicc bice bici bick bieb bier bike bira birb bire biri birk birr brab brac brae brai brak brca brcb brce brea breb brec bree brei brek brer bria bric brie brik brka brkb brrr caaa caab caac caba cabe cabi cac- caca cacc cace caci cack cacr caec caei caer caia caib caic caik cair caka cake cara carb carc care cari cark carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbia cbir cbka cbkr cbre ccaa ccab ccac ccai ccar ccba ccbc ccca cccb cccc ccci ccee ccic ccii ccir ccra ccrc ccre ccri ceac cear ceba cec- ceca cece ceci ceeb ceec ceke cer- cera cerc cere ceri ciaa ciak ciar ciba cibc cibe cibi cica cicc cici cicr ciee cier ciia ciii cika cikr cira cirb circ cire ciri cirk cirr ckac ckbc ckbe ckbi ckck cker ckrc crab crac crai crar crbc crca crcc crce crcr cre- crea creb crec cree crei cria crib cric crie crik crkc eaba eaca eacc eaec eara earb eare ebac ebba ebbc ebbr ebcc eber ebic ecaa ecac ecai ecar ecbc ecbe ecca eccb eccc ecce ecci ecib ecka ecra ecrc ecri ecrr eeca eeea eeee eeka eeke eera eerc eica eick eiec eiei eier eika eike eiki eira eire eka- ekab ekeb ekek eker ekka ekki erba erbb erbe erca ercc erce ereb erec erei erer eria eric erie erik erke erki erra errc erre i-be iaaa iaac iaai iaba iaca iacc iacr iaea iaec iaia iara iarc iare ibac ibar ibca ibea ibec ibia ibie ibra ibrc ibri icaa icab icac icai icar icbc icca iccb iccc icci iccr icea icec icee icer icke icra icrc icre icrr ieac iecc ieie iera iere ieri iiac iica iiie iiii iira iirc ikar ikea ikee iker ikki ikra ikri irac irae irai irak irar irbe irca ircc iree irer iri- iria iric irie irka irki irra irrc irre irri k-ci kaaa kaab kaai kaak kaar kaba kabb kabc kabe kabi kabr kacb kacc kace kaci kaei kaer kaia kaib kaic kaie kaii kaik kair kaka kakc kake kaki kakk kara karb kare kari kark karr kbaa kbab kbac kbae kbai kbak kbar kbba kbbb kbbc kbbe kbbi kbbk kbbr kbca kbcb kbce kbci kbck kbcr kbeb kbec kbee kbek kber kbia kbib kbic kbie kbik kbkb kbkk kbkr kbra kbrb kbrc kbre kbri kbrk kcaa kcab kcac kcai kcar kcba kcbc kcbi kcbk kcbr kcca kccb kccc kcci kcck kccr kcea kceb kcec kcee kcei kcic kcie kcii kcir kckc kckk kckr kcrc kcri kcrr kea- keak kear keba kebb kebc kebe kebi kebr keca keck kecr keek keer keib keii keik keir keka kekb kekc keke keki ker- kera kerb kerc kere keri kerk kerr kiab kiac kiai kiar kiba kibb kibc kibe kibi kibr kica kicb kicc kice kick kicr kier kiia kiic kiii kiik kika kikc kiki kikk kikr kira kirb kirc kiri kirk kirr kkaa kkac kkai kkar kkba kkbb kkbe kkbi kkbr kkcb kkci kkck kkcr kkea kkia kkic kkik kkkk kkrb kkrc kkre kkrk kkrr krab krac krae krai krak krar krba krbb krbe krbi krbk krbr krca krcb krcc krce krci krea kreb krec kree krei krek kria krib krik krka krkc krke krki krkk krkr krrb krrc krre krri krrk krrr raab raak raba rabb rabe rabi rabk rac- raca racc race raci rack raec raer raia raic raie raii raik rair raka rake raki rakk rara rarb rare rari rark rbbb rbbr rcac rcbc rccb rccc rcic rea- reac reae reak rear reba rebb rebe rebk reca recc rece reci reck recr reeb reek reia reii reik reir reka reke reki rera rere reri riaa riab riai riak rib- riba ribe rica ricc rice rick riek rier riia rika rike riki rikk rire riri rrrr