-er a-a a-c aaa aac aae aaf aam aao aap aar aas ac- aca acc ace acf acm aco acp acr acs aea aec aee aef aem aeo aep aer aes af- afa afc afe aff afm afo afp afr afs ama amc ame amf amm amo amp amr ams aoa aoc aoe aof aom aoo aop aor aos ap- apa apc ape apf apm apo app apr aps ar- ara arc are arf arm aro arp arr ars as- asa asc ase asf asm aso asp asr ass c-- caa cac cae caf cam cao cap car cas cca ccc cce ccf ccm cco ccp ccr ccs ce- cea cec cee cef cem ceo cep cer ces cfa cfc cfe cff cfm cfo cfp cfr cfs cma cmc cme cmf cmm cmo cmp cmr cms co- coa coc coe cof com coo cop cor cos cpa cpc cpe cpf cpm cpo cpp cpr cps cra crc cre crf crm cro crp crr crs csa csc cse csf csm cso csp csr css eaa eac eae eaf eam eao eap ear eas ec- eca ecc ece ecf ecm eco ecr ecs eea eec eee eef eem eeo eep eer ees ef- efa efc efe eff efm efo efp efr efs em- ema emc eme emf emm emo emp emr ems eo- eoa eoc eoe eof eom eoo eop eor eos ep- epa epc epe epf epm epo epp epr eps era erc ere erf erm ero erp err ers es- esa esc ese esf esm eso esp esr ess faa fac fae faf fam fao fap far fas fca fcc fce fcf fcm fco fcp fcr fcs fea fec fee fef fem feo fep fer fes ffa ffc ffe fff ffm ffo ffp ffr ffs fma fmc fme fmf fmm fmo fmp fmr fms foa foc foe fof fom foo fop for fos fpa fpc fpe fpm fpo fpp fpr fps fra frc fre frf frm fro frp frr frs fsa fsc fse fsf fsm fso fsp fsr fss m-f m-o m-r maa mac mae maf mam mao map mar mas mc- mca mcc mce mcf mcm mco mcp mcr mcs mea mec mee mef mem meo mep mer mes mfa mfc mfe mff mfm mfo mfp mfr mfs mma mmc mme mmf mmm mmo mmp mmr mms moa moc moe mof mom moo mop mor mos mpa mpc mpe mpf mpm mpo mpp mpr mps mra mrc mre mrf mrm mro mrp mrr mrs msa msc mse msf msm mso msp msr mss oaa oac oae oaf oam oao oap oar oas oc- oca occ ocf ocm oco ocp ocr ocs oea oec oee oef oem oeo oep oer oes of- ofa ofc ofe off ofm ofo ofp ofr ofs om- oma omc ome omf omm omo omp omr oms oo- ooa ooc oof oom ooo oop oor oos op- opa opc ope opf opm opo opp opr ops or- ora orc ore orf orm oro orp orr ors os- osa osc ose osf osm oso osp osr oss p-p paa pac pae paf pam pao pap par pas pca pcc pce pcf pcm pco pcp pcr pcs pea pec pee pef pem peo pep per pes pfa pfc pfe pff pfm pfo pfp pfr pfs pma pmc pme pmf pmm pmo pmp pmr pms poa poc poe pof pom poo pop por pos ppa ppc ppe ppf ppm ppo ppp ppr pps pra prc pre prf prm pro prp prr prs ps- psa psc pse psf psm pso psp psr pss ra- raa rac rae raf ram rao rap rar ras rca rcc rce rcf rcm rco rcp rcr rcs re- rea rec ree ref rem reo rep rer res rfa rfc rfe rff rfm rfo rfp rfr rfs rma rmc rme rmf rmm rmo rmp rmr rms roa roc roe rof rom roo rop ror ros rpa rpc rpe rpf rpm rpo rpp rpr rps rra rrc rrf rrm rrp rrr rrs rsa rsc rse rsf rsm rso rsp rsr rss saa sac sae saf sam sao sap sar sas sca scc sce scf scm sco scp scr scs se- sea sec see sef sem seo sep ser ses sfa sfc sfe sff sfm sfo sfp sfr sfs sma smc sme smf smm smo smp smr sms soa soc soe sof som soo sop sor sos spa spc spe spf spm spo spp spr sps sr- sra src sre srf srm sro srp srr srs ss- ssa ssc sse ssf ssm sso ssp ssr sss