-er a-a a-c aaa aac aae aak aam aap aar aas ac- aca acc ace ack acm acp acr acs aea aec aee aek aem aep aer aes aka akc ake akk akm akp akr aks ama amc ame amk amm amp amr ams ap- apa apc ape apk apm app apr aps ar- ara arc are ark arm arp arr ars as- asa asc ase ask asm asp asr ass c-- caa cac cae cak cam cap car cas cca ccc cce cck ccm ccp ccr ccs ce- cea cec cee cek cem cep cer ces cka ckc ckm cks cma cmc cme cmk cmm cmp cmr cms cpa cpc cpe cpk cpm cpp cpr cps cra crc cre crk crm crp crr crs csa csc cse csk csm csp csr css eaa eac eae eak eam eap ear eas ec- eca ecc ece eck ecm ecr ecs eea eec eee eek eem eep eer ees eka ekc eke ekp ekr eks em- ema emc eme emk emm emp emr ems ep- epa epc epe epm epp epr eps era erc ere erk erm erp err ers es- esa esc ese esk esm esp esr ess ka- kaa kac kae kak kam kap kar kas kca kcc kce kck kcm kcp kcr kcs ke- kea kec kee kek kem kep ker kes kkc kke kkk kkm kkp kkr kks kma kmc kme kmk kmm kmp kms kpa kpc kpe kpk kpm kpp kpr kps kra krc krk krp krr krs ksa ksc kse ksk ksm ksp ksr kss m-r maa mac mae mak mam map mar mas mc- mca mcc mce mck mcm mcp mcr mcs mea mec mee mek mem mep mer mes mka mkc mke mkk mkm mkp mkr mks mma mmc mme mmk mmm mmp mmr mms mpa mpc mpe mpk mpm mpp mpr mps mra mrc mre mrk mrm mrp mrr mrs msa msc mse msk msm msp msr mss p-p paa pac pae pak pam pap par pas pca pcc pce pck pcm pcp pcr pcs pea pec pee pek pem pep per pes pka pkc pke pkm pkp pkr pks pma pmc pme pmk pmm pmp pmr pms ppa ppc ppe ppk ppm ppp ppr pps pra prc pre prk prm prp prr prs ps- psa psc pse psk psm psp psr pss ra- raa rac rae rak ram rap rar ras rca rcc rce rcm rcp rcr rcs re- rea rec ree rek rem rep rer res rkc rke rkk rkm rkp rks rma rmc rme rmm rmp rmr rms rpa rpc rpe rpk rpm rpp rpr rps rra rrc rrk rrm rrp rrr rrs rsa rsc rse rsk rsm rsp rsr rss saa sac sae sak sam sap sar sas sca scc sce sck scm scp scr scs se- sea sec see sek sem sep ser ses sk- ska skc ske skk skm skp skr sks sma smc sme smk smm smp smr sms spa spc spe spk spm spp spr sps sr- sra src sre srk srm srp srr srs ss- ssa ssc sse ssk ssm ssp ssr sss