-er a-a a-c aaa aac aae aaf aak aam aao aap aar aas ac- aca acc ace acf ack acm aco acp acr acs aea aec aee aef aek aem aeo aep aer aes af- afa afc afe aff afk afm afo afp afr afs aka akc ake akk akm ako akp akr aks ama amc ame amf amk amm amo amp amr ams aoa aoc aoe aof aok aom aoo aop aor aos ap- apa apc ape apf apk apm apo app apr aps ar- ara arc are arf ark arm aro arp arr ars as- asa asc ase asf ask asm aso asp asr ass c-- caa cac cae caf cak cam cao cap car cas cca ccc cce ccf cck ccm cco ccp ccr ccs ce- cea cec cee cef cek cem ceo cep cer ces cfa cfc cfe cff cfk cfm cfo cfp cfr cfs cka ckc ckm cko cks cma cmc cme cmf cmk cmm cmo cmp cmr cms co- coa coc coe cof cok com coo cop cor cos cpa cpc cpe cpf cpk cpm cpo cpp cpr cps cra crc cre crf crk crm cro crp crr crs csa csc cse csf csk csm cso csp csr css eaa eac eae eaf eak eam eao eap ear eas ec- eca ecc ece ecf eck ecm eco ecr ecs eea eec eee eef eek eem eeo eep eer ees ef- efa efc efe eff efm efo efp efr efs eka ekc eke ekf eko ekp ekr eks em- ema emc eme emf emk emm emo emp emr ems eo- eoa eoc eoe eof eok eom eoo eop eor eos ep- epa epc epe epf epm epo epp epr eps era erc ere erf erk erm ero erp err ers es- esa esc ese esf esk esm eso esp esr ess faa fac fae faf fak fam fao fap far fas fca fcc fce fcf fck fcm fco fcp fcr fcs fea fec fee fef fek fem feo fep fer fes ffa ffc ffe fff ffk ffm ffo ffp ffr ffs fka fkc fkf fkk fkm fkp fma fmc fme fmf fmm fmo fmp fmr fms foa foc foe fof fok fom foo fop for fos fpa fpc fpe fpk fpm fpo fpp fpr fps fra frc fre frf frk frm fro frp frr frs fsa fsc fse fsf fsk fsm fso fsp fsr fss ka- kaa kac kae kaf kak kam kao kap kar kas kca kcc kce kck kcm kcp kcr kcs ke- kea kec kee kef kek kem keo kep ker kes kfa kfc kff kfm kfo kfs kkc kke kkk kkm kkp kkr kks kma kmc kme kmf kmk kmm kmo kmp kms koa koc koe kof kok kom koo kop kor kos kpa kpc kpe kpf kpk kpm kpo kpp kpr kps kra krc krf krk kro krp krr krs ksa ksc kse ksf ksk ksm kso ksp ksr kss m-f m-o m-r maa mac mae maf mak mam mao map mar mas mc- mca mcc mce mcf mck mcm mco mcp mcr mcs mea mec mee mef mek mem meo mep mer mes mfa mfc mfe mff mfm mfo mfp mfr mfs mka mkc mke mkk mkm mko mkp mkr mks mma mmc mme mmf mmk mmm mmo mmp mmr mms moa moc moe mof mok mom moo mop mor mos mpa mpc mpe mpf mpk mpm mpo mpp mpr mps mra mrc mre mrf mrk mrm mro mrp mrr mrs msa msc mse msf msk msm mso msp msr mss oaa oac oae oaf oak oam oao oap oar oas oc- oca occ ocf ock ocm oco ocp ocr ocs oea oec oee oef oem oeo oep oer oes of- ofa ofc ofe off ofm ofo ofp ofr ofs oka okc oke okk oko okp okr oks om- oma omc ome omf omm omo omp omr oms oo- ooa ooc oof ook oom ooo oop oor oos op- opa opc ope opf opk opm opo opp opr ops or- ora orc ore orf ork orm oro orp orr ors os- osa osc ose osf osk osm oso osp osr oss p-p paa pac pae paf pak pam pao pap par pas pca pcc pce pcf pck pcm pco pcp pcr pcs pea pec pee pef pek pem peo pep per pes pfa pfc pfe pff pfk pfm pfo pfp pfr pfs pka pkc pke pkf pkm pko pkp pkr pks pma pmc pme pmf pmk pmm pmo pmp pmr pms poa poc poe pof pok pom poo pop por pos ppa ppc ppe ppf ppk ppm ppo ppp ppr pps pra prc pre prf prk prm pro prp prr prs ps- psa psc pse psf psk psm pso psp psr pss ra- raa rac rae raf rak ram rao rap rar ras rca rcc rce rcf rcm rco rcp rcr rcs re- rea rec ree ref rek rem reo rep rer res rfa rfc rfe rff rfk rfm rfo rfp rfr rfs rkc rke rkf rkk rkm rko rkp rks rma rmc rme rmf rmm rmo rmp rmr rms roa roc roe rof rok rom roo rop ror ros rpa rpc rpe rpf rpk rpm rpo rpp rpr rps rra rrc rrf rrk rrm rrp rrr rrs rsa rsc rse rsf rsk rsm rso rsp rsr rss saa sac sae saf sak sam sao sap sar sas sca scc sce scf sck scm sco scp scr scs se- sea sec see sef sek sem seo sep ser ses sfa sfc sfe sff sfk sfm sfo sfp sfr sfs sk- ska skc ske skf skk skm sko skp skr sks sma smc sme smf smk smm smo smp smr sms soa soc soe sof sok som soo sop sor sos spa spc spe spf spk spm spo spp spr sps sr- sra src sre srf srk srm sro srp srr srs ss- ssa ssc sse ssf ssk ssm sso ssp ssr sss