-er a-a a-b a-c aaa aab aac aae aak aap aar aas ab- aba abb abc abe abk abp abr abs ac- aca acb acc ace ack acp acr acs aea aeb aec aee aek aep aer aes aka akb akc ake akk akp akr aks ap- apa apb apc ape apk app apr aps ar- ara arb arc are ark arp arr ars as- asa asb asc ase ask asp asr ass b-p baa bab bac bae bak bap bar bas bba bbb bbc bbe bbk bbp bbr bbs bca bcb bcc bce bck bcp bcr bcs be- bea beb bec bee bek bep ber bes bka bkb bkc bke bkk bkp bkr bks bpa bpb bpc bpe bpp bpr bps bra brb bre brk brp brr brs bsa bsb bsc bse bsk bsp bsr bss c-- caa cab cac cae cak cap car cas cba cbb cbc cbe cbk cbp cbr cbs cca ccb ccc cce cck ccp ccr ccs ce- cea ceb cec cee cek cep cer ces cka ckb ckc cks cpa cpb cpc cpe cpk cpp cpr cps cra crb crc cre crk crp crr crs csa csb csc cse csk csp csr css eaa eab eac eae eak eap ear eas eba ebb ebc ebe ebk ebp ebr ebs ec- eca ecb ecc ece eck ecr ecs eea eeb eec eee eek eep eer ees eka ekb ekc eke ekp ekr eks ep- epa epb epc epe epp epr eps era erb erc ere erk erp err ers es- esa esb esc ese esk esp esr ess ka- kaa kab kac kae kak kap kar kas kba kbb kbc kbe kbk kbp kbr kbs kca kcb kcc kce kck kcp kcr kcs ke- kea keb kec kee kek kep ker kes kkb kkc kke kkk kkp kkr kks kpa kpc kpe kpk kpp kpr kps kra krc krk krp krr krs ksa ksb ksc kse ksk ksp ksr kss p-p paa pab pac pae pak pap par pas pba pbb pbc pbe pbk pbp pbr pbs pca pcb pcc pce pck pcp pcr pcs pea peb pec pee pek pep per pes pka pkb pkc pke pkp pkr pks ppa ppb ppc ppe ppk ppp ppr pps pra prb prc pre prk prp prr prs ps- psa psb psc pse psk psp psr pss ra- raa rab rac rae rak rap rar ras rba rbb rbc rbe rbk rbp rbr rbs rca rcb rcc rce rcp rcr rcs re- rea reb rec ree rek rep rer res rkb rkc rke rkk rkp rks rpa rpb rpc rpe rpk rpp rpr rps rra rrb rrc rrk rrp rrr rrs rsa rsb rsc rse rsk rsp rsr rss saa sab sac sae sak sap sar sas sba sbb sbc sbe sbk sbp sbr sbs sca scb scc sce sck scp scr scs se- sea seb sec see sek sep ser ses sk- ska skb skc ske skk skp skr sks spa spb spc spe spk spp spr sps sr- sra srb src sre srk srp srr srs ss- ssa ssb ssc sse ssk ssp ssr sss

-ase a-ak a-be aaaa aaab aaac aaae aaap aaar aaas aaba aabb aabc aabp aaca aacb aacc aace aack aacp aacr aacs aaea aaec aaep aaes aaka aake aapa aapc aaps aara aarc aare aarp aars aasa aasc aase aass abaa abab abac abae abak abap abar abas abb- abba abbb abbe abbr abbs abca abcb abcc abcp abcr abcs abec abee aber abes abpa abpc abpp abpr abps abra abrc abrs abs- absa abse absp abss acaa acab acac acae acap acar acas acba acca accc acce accp accs ace- acea acec acek acer aces acke acks acpa acpe acpr acps acr- acra acrc acre acrr acrs acsa acsc acse acss aeac aeap aeas aebs aecb aeer aeka aer- aera aerc aers aesc aess akaa akae akap akar akas akca akee aker akes akka akr- akra akre aksa apac apak apap apar apas apba apbr apbs apca apcb apcc apcr apcs apea apec apep aper apes apke appa appc appr apps apra aprc apre aprs apsa apse apss arab arac arae arak arap arar aras arba arbe arbs arc- arca arce arcs area arec aree arek arep ares arka arke arks arpa arpe arps arr- arra arrc arre arrk arrr arrs ars- arsa arsc arse arsk asaa asab asac asae asak asap asar asas asba asc- asca ascb ascc asce ascp ascr asea asec asee asek asep aser ases aska aske askr asks aspa aspc aspe aspr asps asra asrc asrs assa assc asse assk assp assr asss baaa baak baar baas baba babb babe babr babs bac- baca bacc bace back bacs baek baer baes bak- baka bake bakr baks bapa bapc bape bapp baps bar- bara barb barc bare bark barr bars basa basc base bask bass bbas bbbb bbbs bbeb bbpr bbrc bcaa bcap bcar bcas bcbc bcbp bcbs bcca bccc bccs bcec bcer bces bcpp bcps bcra bcrs bcsa bcsc bcss beak beap bear beas beba bebb bebe beca beck becs beeb beek beep beer bees beka beke beks bera berc bere berk berr bers bes- besa bese besk bess bkpr bksp bpcp bpea bprc bpsa brab brac brae brak bras brca brcb brce brea breb brec bree brek brep brer bres brka brkb brrr brrs brsb brsr bsaa bsac bsap bsas bscp bscs bsea bseb bsec bsee bser bses bspp bspr bsra bssc bsse caaa caab caac caap caas caba cabe cabs cac- caca cacc cace cack cacr caec caer caes caka cake capa capb capc cape capp caps cara carb carc care cark carp carr cars casa casb casc case cask casp casr cass cbac cbar cbbc cbbs cbca cbcc cbce cbcp cbcr cbcs cbea cbec cbee cber cbka cbkr cbpc cbpp cbre cbsa cbsc cbse ccaa ccab ccac ccap ccar ccas ccba ccbc ccca cccb cccc cccp cccs ccee ccpa ccpe ccpp ccpr ccps ccra ccrc ccre ccrp ccrs ccsa ccsp ccss