a-ak a-be aaaa aaab aaac aaad aaae aaal aaba aabb aabc aabd aabl aaca aacb aacc aacd aace aack aacl aada aadc aade aaea aaec aaka aake aala aalc aald aale aall abaa abab abac abad abae abak abal abb- abba abbb abbe abca abcb abcc abcd abcl abda abec abed abee abel abla able acaa acab acac acad acae acba acbl acca accc accd acce acda acdb acdc acde ace- acea acec aced acek acel ackd acke acla aclc acle adaa adab adac adad adae adak adal adba adbc adcc adda addc addd adde addl adea adeb adee adel adle aeac aecb aecl aede aeka aela aelc akaa akae akal akca aked akee akel akka akle alaa alac alad alae alak alal alb- alba albc albe alca alcc alce ald- alda alde aldl alea alec aled alee alek alk- alka alkb alkd alke all- alla alle alll baaa baad baak baal baba babb babe bac- baca bacc bace back bada badb badd bade baed baek bael bak- baka bake bakl bala balc bald bale balk ball bbad bbbb bbdd bbeb bblb bcaa bcbc bcca bccc bccl bcda bcde bcec bdbc bddc bdle bead beak beal beba bebb bebe beca beck beda bede bedl beeb beed beek beel beka beke bela beld bele belk bell blaa blab blac blad blae blak bldc blea bleb bled blee blek blkb blkd c-cd caaa caab caac caal caba cabe cac- caca cacc cace cack cada cadc cadd cade caec caka cake cala calc cald cale calk call cbac cbal cbbc cbca cbcc cbce cbcl cbdb cbdc cbea cbec cbee cbka cbkl cblb cblc ccaa ccab ccac ccad ccba ccbc ccca cccb cccc cccl ccdc cced ccee ccel ccla cclc cd-e cdaa cdac cdad cdba cdda cddb cddl cdec ceac cead ceal ceba cec- ceca cece ceda cedd cede ceeb ceec ceel ceke cel- cela celc cele cell ckac ckbc ckbe ckck ckcl clab clad clcd cldc clea clec cled clee clek daab daad daae daal daba dabb daca dace dada dade daeb daka dake dala dale dalk dall dbcc dcbc dcca dccb dccc dccl dcdb dddd ddlc deac dead deae deak deal deba debe dec- deca decc decd dece deck decl deda dedd dede deeb deed deek deel dek- deka deke dela deld dele delk dell dkba dkdc dlab dlbd e-cl e-la eaba eaca eacc eada eadb eadd eaec eala ealc eald eale ebac ebal ebba ebbc ebcc ebed ebel ebla ecaa ecac ecad ecal ecbc ecbe ecca eccb eccc ecce eccl ecdc ecdl eced ecka ecla edac edad edca edda eddc edde ede- edea edel edla edle eeca eede eeea eeee eeka eeke eele eka- ekab ekeb eked ekek ekka el-b elab elac elad elal elba elbe elca elcb elce elda elde elea elec eled elee elek elka elke ella elle kaaa kaab kaak kaal kaba kabb kabc kabd kabe kacb kacc kacd kace kacl kad- kada kadd kade kadl kael kaka kakc kake kakk kala kalb kalc kald kale kalk kall kbaa kbab kbac kbad kbae kbak kbal kbba kbbb kbbc kbbd kbbe kbbk kbbl kbca kbcb kbce kbck kbcl kbdb kbde kbdl kbeb kbec kbed kbee kbek kbel kbkb kbkk kbkl kbla kblb kbld kble kbll kcaa kcab kcac kcad kcal kcba kcbc kcbd kcbk kcbl kcca kccb kccc kccd kcck kccl kcda kcdc kcdd kcea kceb kcec kced kcee kcel kckc kckk kckl kcla kclc kcle kclk kcll kdaa kdab kdac kdad kdae kdak kdal kdbb kdbl kdca kdcc kdcd kdce kddb kddc kddd kddk kddl kdeb kdec kdel kdka kdkb kdkd kdkk kdla kdlb kdlc kdld kdll kea- kead keak keal keba kebb kebc kebe keca keck keda kedb kedc kedd kede keed keek keel keka kekb kekc keke kekl kela keld kele kelk kell kkaa kkac kkal kkba kkbb kkbd kkbe kkbl kkcb kkcd kkck kkcl kkda kkdc kkdd kkdl kkea kked kkkk kklb kklc kkld kkll klaa klab klac klad klak klal klbb klbc klbd klbe klbl klca klcb klcc klcd klce klck klcl kldc kldd klde klea kleb klec kled klee klek klka klkc klkk klkl klla kllb kllc klle kllk laaa laac laad laak laal laba labe laca lacc lace lack lacl lada ladd lade lael laka lake lala lald lale lall lbcc lcac lcad lcbc lcca lccc lcce lcdd leaa lead leak leal leba lebd leca lece leck leda lede leea leed leek leel leka leke lekk lela lele lell lkab lkal llcc lldb lldc lllc llll