-er a-a a-b a-c aaa aab aac aae aak aam aap aar ab- aba abb abc abe abk abm abp abr ac- aca acb acc ace ack acm acp acr aea aeb aec aee aek aem aep aer aka akb akc ake akk akm akp akr ama amb amc ame amk amm amp amr ap- apa apb apc ape apk apm app apr ar- ara arb arc are ark arm arp arr b-p baa bab bac bae bak bam bap bar bba bbb bbc bbe bbk bbm bbp bbr bca bcb bcc bce bck bcm bcp bcr be- bea beb bec bee bek bem bep ber bka bkb bkc bke bkk bkm bkp bkr bma bmb bmc bme bmk bmm bmp bmr bpa bpb bpc bpe bpm bpp bpr bra brb bre brk brm brp brr c-- caa cab cac cae cak cam cap car cba cbb cbc cbe cbk cbm cbp cbr cca ccb ccc cce cck ccm ccp ccr ce- cea ceb cec cee cek cem cep cer cka ckb ckc ckm cma cmb cmc cme cmk cmm cmp cmr cpa cpb cpc cpe cpk cpm cpp cpr cra crb crc cre crk crm crp crr eaa eab eac eae eak eam eap ear eba ebb ebc ebe ebk ebm ebp ebr ec- eca ecb ecc ece eck ecm ecr eea eeb eec eee eek eem eep eer eka ekb ekc eke ekp ekr em- ema emb emc eme emk emm emp emr ep- epa epb epc epe epm epp epr era erb erc ere erk erm erp err ka- kaa kab kac kae kak kam kap kar kba kbb kbc kbe kbk kbm kbp kbr kca kcb kcc kce kck kcm kcp kcr ke- kea keb kec kee kek kem kep ker kkb kkc kke kkk kkm kkp kkr kma kmb kmc kme kmk kmm kmp kpa kpc kpe kpk kpm kpp kpr kra krc krk krp krr m-r maa mab mac mae mak mam map mar mba mbb mbc mbe mbk mbm mbp mbr mc- mca mcb mcc mce mck mcm mcp mcr mea meb mec mee mek mem mep mer mka mkb mkc mke mkk mkm mkp mkr mma mmb mmc mme mmk mmm mmp mmr mpa mpb mpc mpe mpk mpm mpp mpr mra mrb mrc mre mrk mrm mrp mrr p-p paa pab pac pae pak pam pap par pba pbb pbc pbe pbk pbm pbp pbr pca pcb pcc pce pck pcm pcp pcr pea peb pec pee pek pem pep per pka pkb pkc pke pkm pkp pkr pma pmb pmc pme pmk pmm pmp pmr ppa ppb ppc ppe ppk ppm ppp ppr pra prb prc pre prk prm prp prr ra- raa rab rac rae rak ram rap rar rba rbb rbc rbe rbk rbm rbp rbr rca rcb rcc rce rcm rcp rcr re- rea reb rec ree rek rem rep rer rkb rkc rke rkk rkm rkp rma rmb rmc rme rmm rmp rmr rpa rpb rpc rpe rpk rpm rpp rpr rra rrb rrc rrk rrm rrp rrr

a-ak a-be aaaa aaab aaac aaae aaam aaap aaar aaba aabb aabc aabm aabp aaca aacb aacc aace aack aacm aacp aacr aaea aaec aaem aaep aaka aake aama aamb aamc aame aamp aamr aapa aapc aapm aara aarc aare aarm aarp abaa abab abac abae abak abam abap abar abb- abba abbb abbe abbr abca abcb abcc abcp abcr abec abee aber abma abmb abmc abpa abpc abpm abpp abpr abra abrc acaa acab acac acae acap acar acba acca accc acce accm accp ace- acea acec acek acem acer acke acma acmc acme acmp acpa acpe acpm acpr acr- acra acrc acre acrm acrr aeac aeap aecb aeer aeka aer- aera aerc akaa akae akam akap akar akca akee aker akka akr- akra akre amaa amac amae amam amap amar amb- amba ambe ambr amca amcc amec amee amer amka amm- amma amme ampa ampc ampe ampk ampm amra amrc apac apak apam apap apar apba apbr apca apcb apcc apcm apcr apea apec apem apep aper apke apma appa appc appr apra aprc apre arab arac arae arak aram arap arar arba arbe arc- arca arce arcm area arec aree arek arem arep arka arke arma armc arme armm arpa arpe arr- arra arrc arre arrk arrr baaa baak baam baar baba babb babe babm babr bac- baca bacc bace back baek baer bak- baka bake bakr bama bamb bamc bame bamm bamp bapa bapc bape bapp bar- bara barb barc bare bark barm barr bbbb bbcm bbeb bbpr bbrc bcaa bcam bcap bcar bcbc bcbp bcca bccc bccm bcec bcer bcma bcmp bcpp bcra beak beam beap bear beba bebb bebe beca beck beeb beek beem beep beer beka beke bema beme bera berc bere berk berm berr bkpr bmaa bmce bmep bpcp bpea bpmc bprc brab brac brae brak bram brca brcb brce brea breb brec bree brek brem brep brer brka brkb brmc brrm brrr caaa caab caac caam caap caba cabe cac- caca cacc cace cack cacm cacr caec caem caer caka cake cama camb camc came camk camm camp capa capb capc cape capm capp cara carb carc care cark carm carp carr cbac cbar cbbc cbca cbcc cbce cbcm cbcp cbcr cbea cbec cbee cber cbka cbkm cbkr cbme cbpc cbpp cbre cbrm ccaa ccab ccac ccam ccap ccar ccba ccbc ccca cccb cccc cccm cccp ccee cckm ccma ccmb ccmc ccmm ccmp ccpa ccpe ccpm ccpp ccpr ccra ccrc ccre ccrp ceac cear ceba cebp cec- ceca cece cecm cecp ceeb ceec ceem ceke cema cemb ceme cemm cemp cemr cepa cepc cepe cepp cepr cer- cera cerc cere cerp ckac ckbc ckbe ckck ckcm ckem cker ckmp ckpc ckpr ckrc ckrm cmaa cmac cmap cmba cmbc cmcc cmea cmec cmmb cmmc cmpa cmpc cmpk cmpp cmra cmrr cpaa cpac cpam cpap cpbc cpca cpce cpcm cpea cpeb cpep cper cpma cpme cpmp cppa cppm cpre cprm crab