a-a a-b a-c aaa aab aac aae aak aao aap aax ab- aba abb abc abe abk abo abp abx ac- aca acb acc ace ack aco acp acx aea aeb aec aee aek aeo aep aex aka akb akc ake akk ako akp aoa aob aoc aoe aok aoo aop aox ap- apa apb apc ape apk apo app apx ax- axa axe axk axo axp axx b-p baa bab bac bae bak bao bap bax bba bbb bbc bbe bbk bbo bbp bbx bca bcb bcc bce bck bco bcp bcx be- bea beb bec bee bek beo bep bex bka bkb bkc bke bkk bko bkp bkx boa bob boc boe bok boo bop box bpa bpb bpc bpe bpo bpp bpx bxb bxo bxx c-- caa cab cac cae cak cao cap cax cba cbb cbc cbe cbk cbo cbp cbx cca ccb ccc cce cck cco ccp ccx ce- cea ceb cec cee cek ceo cep cex cka ckb ckc cko ckx co- coa cob coc coe cok coo cop cox cpa cpb cpc cpe cpk cpo cpp cpx cxc cxk cxo cxp cxx eaa eab eac eae eak eao eap eax eba ebb ebc ebe ebk ebo ebp ebx ec- eca ecb ecc ece eck eco ecx eea eeb eec eee eek eeo eep eex eka ekb ekc eke eko ekp eo- eoa eob eoc eoe eok eoo eop ep- epa epb epc epe epo epp epx ex- exa exc exe exo exp exx ka- kaa kab kac kae kak kao kap kax kba kbb kbc kbe kbk kbo kbp kbx kca kcb kcc kce kck kcp kcx ke- kea keb kec kee kek keo kep kex kkb kkc kke kkk kkp koa kob koc koe kok koo kop kpa kpc kpe kpk kpo kpp kxo oaa oab oac oae oak oao oap oax ob- oba obb obc obe obk obo obp obx oc- oca ocb occ ock oco ocp ocx oea oeb oec oee oeo oep oex oka okb okc oke okk oko okp oo- ooa oob ooc ook ooo oop oox op- opa opb opc ope opk opo opp opx ox- oxa oxb oxc oxo oxx p-p paa pab pac pae pak pao pap pax pba pbb pbc pbe pbk pbo pbp pbx pca pcb pcc pce pck pco pcp pcx pea peb pec pee pek peo pep pex pka pkb pkc pke pko pkp poa pob poc poe pok poo pop pox ppa ppb ppc ppe ppk ppo ppp ppx pxc pxe pxk xaa xac xak xap xbc xbe xbx xcb xcp xcx xee xep xex xkb xke xoa xoc xok xoo xop xox xpa xpb xpc xpe xpo xpp xxo xxp xxx

a-ak a-be a-ok aaaa aaab aaac aaae aaap aaba aabb aabc aabp aaca aacb aacc aace aack aaco aacp aaea aaec aaep aaka aake aaoe aaoo aapa aapc aapo abaa abab abac abae abak abap abax abb- abba abbb abbe abbo abca abcb abcc abcp abec abee aboa abob abok aboo abox abpa abpc abpp acaa acab acac acae acap acba acca accc acce acco accp ace- acea acec acek acke acoa acoe acop acpa acpe aeac aeap aecb aeka akaa akae akao akap akca akee akka akko akok akpo aoba aoca aoce aokp aopo apac apak apao apap apax apba apca apcb apcc apco apea apec apep apex apke apo- apoc apoe apoo apop apox appa appc appx axce axo- axoa axxo ba-x baaa baak baba babb babe babo bac- baca bacc bace back baco baek bak- baka bake bako bapa bapc bape bapp bbbb bbeb bbox bcaa bcap bcbc bcbp bcca bccc bcec bcpp beak beap beba bebb bebe bebo beca beck beeb beek beep beka beke beko beo- beok bepo boab boac boak boba bobb bobe bobo boca boce bock boco boea boec boee boeo boep boka boke boko boob booc booe book boop boox bopa bope bopp boxa bpcp bpea bpoe c-bo caaa caab caac caap caba cabe cabo cac- caca cacc cace cack caco caec caex caka cake capa capb capc cape capo capp capx caxa cbac cbax cbbc cbca cbcc cbce cbcp cbea cbec cbee cbka cbko cbox cbpc cbpp cbxa ccaa ccab ccac ccap ccba ccbc ccca cccb cccc cccp ccee ccob ccoc ccpa ccpe ccpp ceac ceba cebp cec- ceca cece ceco cecp ceeb ceec ceke ceop cepa cepc cepe cepo cepp cexe ckac ckbc ckbe ckbx ckck ckco ckcx ckoa ckob ckoc ckoo ckpc coak coax coba cobb cobe cobo coca coce cock coco cocp coep coex cok- coka coke coko coob cook coop copa cope copo copp coxa coxe cpaa cpac cpap cpbc cpca cpce cpea cpeb cpep cpox cppa cxpo cxxx eaba eaca eacc eaec eaop eapc eapp ebac ebba ebbc ebbo ebcc eboe eboo ebox ebpo ecaa ecac ecao ecbc ecbe ecca eccb eccc ecce ecco ecka ecko eco- ecop ecpa ecpp eeca eeea eeee eeka eeke eeoc eka- ekab ekco ekeb ekek ekka ekoa ekpe ekpo eoka epaa epac epcc epec epee epoc epox eppa eppc eppo eppp epxp exa- exco exec exo- expo kaaa kaab kaak kaap kaba kabb kabc kabe kabo kacb kacc kace kaco kacp kaeo kaep kaka kakc kake kakk kako kakx kaoa kaoc kaok kaox kap- kapa kapc kape kapo kapp kaxa kaxe kbaa kbab kbac kbae kbak kbap kbba kbbb kbbc kbbe kbbk kbbo kbca kbcb kbce kbck kbco kbeb kbec kbee kbek kbeo kbex kbkb kbkk kbko kboa kbob kboc kboe kbok kboo kbox kbpa kbpc kbpe kbpk kbpo kbxb kbxx kc-x kcaa kcab kcac kcap kcba kcbc kcbk kcbx kcca kccb kccc kcck kcea kceb kcec kcee kceo kcep kckc kckk kcko kckx kcob kcoe kcox kcpa kcpc kcpo kcpx kea- keak keap keba kebb kebc kebe keca keck keco keek keep keka kekb kekc keke keko keok kep- kepa kepc kepe kepx kexa kexb kexo kexx kkaa kkac kkap kkba kkbb kkbe kkbo kkcb kkck kkco kkea kkex kkkk kkoa kkob kkoo kkpc kkpk kkxa kkxk