a-ak a-be a-ii aaaa aaab aaac aaad aaae aaai aaba aabb aabc aabd aabi aaca aacb aacc aacd aace aaci aack aada aadc aade aadi aaea aaec aaib aaic aaii aaka aake abaa abab abac abad abae abai abak abb- abba abbb abbe abbi abca abcb abcc abcd abci abda abdi abec abed abee abia abib abic abid abie acaa acab acac acad acae acai acba acca accc accd acce acci acda acdb acdc acde acdi ace- acea acec aced acek aci- acia acic acid acie ackd acke adaa adab adac adad adae adai adak adba adbc adbi adcc adci adda addc addd adde addi adea adeb adee adia adib adic adie adik adki aeac aebi aecb aeci aede aeka aiai aiba aica aicc aicd aice aida aidb aidc aide aidi aiea aiee aiia aiib aiic aiid aika aike aiki akaa akae akai akca aked akee akia akid akie akik akka akki ba-i baaa baad baak baba babb babe babi bac- baca bacc bace baci back bada badb badd bade badi baed baek baia baib baic baid baie baik bak- baka bake baki bbad bbbb bbci bbdd bbeb bcaa bcbc bcca bccc bcci bcda bcde bcec bcia bcie bdbc bddc bdii bead beak beba bebb bebe bebi beca beci beck beda bede bedi beeb beed beek beia beic beik beka beke beki biad biak biba bibb bibe bibi bica bicc bice bici bick bida bide bidi bieb bied bike c-cd caaa caab caac caba cabe cabi cac- caca cacc cace caci cack cada cadc cadd cade cadi caec caei caia caib caic caid caik caka cake cbac cbbc cbca cbcc cbce cbdb cbdc cbdi cbea cbec cbee cbia cbid cbka ccaa ccab ccac ccad ccai ccba ccbc ccca cccb cccc ccci ccdc ccdi cced ccee ccic ccid ccii cd-e cdaa cdac cdad cdai cdba cdda cddb cdec cdic cdii ceac cead ceba cec- ceca cece ceci ceda cedd cede cedi ceeb ceec ceke ciaa ciak ciba cibc cibe cibi cica cicc cici cida cidc cide cidi ciee ciia ciid ciii cika ckac ckbc ckbe ckbi ckck daab daad daae daba dabb daca dace daci dada dade dadi daeb daia daid daie daik daka dake daki dbcc dcbc dcca dccb dccc dcci dcdb dcia dcii dddd ddie deac dead deae deak deba debe debi dec- deca decc decd dece deci deck deda dedd dede dedi deeb deed deek deid deie dek- deka deke dia- diab diac diad diak diba dibb dibe dica dice dici dick dida dide didi diea dieb died diii dika dike diki dkba dkdc dkid eaba eaca eacc eada eadb eadd eadi eaec ebac ebba ebbc ebcc ebed ebic ebid ecaa ecac ecad ecai ecbc ecbe ecca eccb eccc ecce ecci ecdc eced ecib ecka edac edad edca edda eddc edde eddi ede- edea edei edia edie edik eeca eede eeea eeee eeka eeke eica eick eid- eide eidi eiec eied eiei eika eike eiki eka- ekab ekeb eked ekek ekka ekki i-be iaaa iaac iaai iaba iaca iacc iadb iadc iaea iaec iaia ibac ibad ibca ibea ibec ibed ibia ibid ibie icaa icab icac icad icai icbc icbd icca iccb iccc icci icdc icdd icde icea icec iced icee icke idad idae idbe idca idce idda idea idec ided idee idia idic idid idie ieac iecc ieie iiac iica iicd iida iide iied iiie iiii ikea ikee ikid ikki k-ci k-id kaaa kaab kaai kaak kaba kabb kabc kabd kabe kabi kacb kacc kacd kace kaci kad- kada kadd kade kadi kaei kaia kaib kaic kaid kaie kaii kaik kaka kakc kake kaki kakk kbaa kbab kbac kbad kbae kbai kbak kbba kbbb kbbc kbbd kbbe kbbi kbbk kbca kbcb kbce kbci kbck kbdb kbde kbdi kbeb kbec kbed kbee kbek kbia kbib kbic kbid kbie kbik kbkb kbkk kcaa kcab kcac kcad kcai kcba kcbc kcbd kcbi kcbk kcca kccb kccc kccd kcci kcck kcda kcdc kcdd kcdi kcea kceb kcec kced kcee kcei kcic kcid kcie kcii kckc kckk kdaa kdab kdac kdad kdae kdai kdak kdbb kdbi kdca kdcc kdcd kdce kddb kddc kddd kddi kddk kdeb kdec kdei kdia kdic kdka kdkb kdkd kdkk kea- kead keak keba kebb kebc kebe kebi keca keck keda kedb kedc kedd kede kedi keed keek keib keid keii keik keka kekb kekc keke keki kiab kiac kiad kiai kiba kibb kibc kibe kibi kica kicb kicc kicd kice kick kida kidb kidd kide kidi kidk kiia kiic kiid kiii kiik kika kikc kikd kiki kikk kkaa kkac kkai kkba kkbb kkbd kkbe kkbi kkcb kkcd kkci kkck kkda kkdc kkdd kkea kked kkia kkic kkid kkik kkkk