a-ak a-be aaaa aaab aaac aaad aaae aaap aaba aabb aabc aabd aabp aaca aacb aacc aacd aace aack aacp aada aadc aade aaea aaec aaep aaka aake aapa aapc abaa abab abac abad abae abak abap abb- abba abbb abbe abca abcb abcc abcd abcp abda abec abed abee abpa abpc abpd abpp acaa acab acac acad acae acap acba acca accc accd acce accp acda acdb acdc acde acdp ace- acea acec aced acek ackd acke acpa acpd acpe adaa adab adac adad adae adak adap adba adbc adcc adda addc addd adde adea adeb adee adp- aeac aeap aecb aede aeka akaa akae akap akca aked akee akka apac apak apap apba apca apcb apcc apcd apda apdd apea apec aped apep apke appa appc appd baaa baad baak baba babb babe bac- baca bacc bace back bada badb badd bade baed baek bak- baka bake bapa bapc bape bapp bbad bbbb bbdd bbeb bcaa bcap bcbc bcbp bcca bccc bcda bcde bcec bcpp bdbc bddc bdpc bead beak beap beba bebb bebe beca beck beda bede beeb beed beek beep beka beke bpcp bpda bpea c-cd caaa caab caac caap caba cabe cac- caca cacc cace cack cada cadc cadd cade caec caka cake capa capb capc capd cape capp cbac cbbc cbca cbcc cbce cbcp cbdb cbdc cbea cbec cbee cbka cbpc cbpp ccaa ccab ccac ccad ccap ccba ccbc ccca cccb cccc cccp ccdc ccdp cced ccee ccpa ccpe ccpp cd-e cdaa cdac cdad cdba cdda cddb cdec ceac cead ceba cebp cec- ceca cece cecp ceda cedd cede ceeb ceec ceke cepa cepc cepe cepp ckac ckbc ckbe ckck ckpc cpaa cpac cpad cpap cpbc cpca cpce cpea cpeb cpep cppa cppd daab daad daae daap daba dabb dabp daca dace dada dade daeb daka dake dapa dape dapp dbcc dbcp dbpc dbpd dcbc dcca dccb dccc dccp dcdb dddd deac dead deae deak deap deba debe dec- deca decc decd dece deck deda dedd dede deeb deed deek deep dek- deka deke depa depc depe depp dkba dkdc dpaa dpac dpbc dpcp dppa dppc eaba eaca eacc eada eadb eadd eadp eaec eapc eapp ebac ebba ebbc ebcc ebed ecaa ecac ecad ecbc ecbe ecca eccb eccc ecce ecdc eced ecka ecpa ecpd ecpp edac edad edca edda eddc edde eddp ede- edea eeca eede eeea eeee eeka eeke eka- ekab ekeb eked ekek ekka ekpe epaa epac epad epcc epec epee eppa eppc eppp kaaa kaab kaak kaap kaba kabb kabc kabd kabe kacb kacc kacd kace kacp kad- kada kadd kade kaep kaka kakc kake kakk kap- kapa kapc kape kapp kbaa kbab kbac kbad kbae kbak kbap kbba kbbb kbbc kbbd kbbe kbbk kbca kbcb kbce kbck kbdb kbde kbeb kbec kbed kbee kbek kbkb kbkk kbpa kbpc kbpe kbpk kcaa kcab kcac kcad kcap kcba kcbc kcbd kcbk kcca kccb kccc kccd kcck kcda kcdc kcdd kcea kceb kcec kced kcee kcep kckc kckk kcpa kcpc kdaa kdab kdac kdad kdae kdak kdap kdbb kdca kdcc kdcd kdce kddb kddc kddd kddk kdeb kdec kdep kdka kdkb kdkd kdkk kea- kead keak keap keba kebb kebc kebe keca keck keda kedb kedc kedd kede kedp keed keek keep keka kekb kekc keke kep- kepa kepc kepd kepe kkaa kkac kkap kkba kkbb kkbd kkbe kkcb kkcd kkck kkda kkdc kkdd kkea kked kkkk kkpc kkpk kpac kpad kpae kpak kpba kpbb kpbd kpbe kpcc kpda kpdb kpdc kpek kpke kpkk kppc kppd kppk kppp paak paap paba paca pacd pace pack pada padd pade paea paec paep paka pake papa papb pape papp pbac pbcc pbed pbpa pbpk pcaa pcad pcae pcap pcba pcbc pcca pccc pcce pcea pcep pcpb pcpp pdac pdca pdcp pdea pdpa peab peac peak peap peba peca pece peck ped- peda pede peec peed peek peep peka peke pekk pepa pepd pepe ppac ppad ppap ppcc ppcd ppdk pppa pppd pppp