-er a-a a-c aaa aac aae aaf aam aar aas ac- aca acc ace acf acm acr acs aea aec aee aef aem aer aes af- afa afc afe aff afm afr afs ama amc ame amf amm amr ams ar- ara arc are arf arm arr ars as- asa asc ase asf asm asr ass c-- caa cac cae caf cam car cas cca ccc cce ccf ccm ccr ccs ce- cea cec cee cef cem cer ces cfa cfc cfe cff cfm cfr cfs cma cmc cme cmf cmm cmr cms cra crc cre crf crm crr crs csa csc cse csf csm csr css eaa eac eae eaf eam ear eas ec- eca ecc ece ecf ecm ecr ecs eea eec eee eef eem eer ees ef- efa efc efe eff efm efr efs em- ema emc eme emf emm emr ems era erc ere erf erm err ers es- esa esc ese esf esm esr ess faa fac fae faf fam far fas fca fcc fce fcf fcm fcr fcs fea fec fee fef fem fer fes ffa ffc ffe fff ffm ffr ffs fma fmc fme fmf fmm fmr fms fra frc fre frf frm frr frs fsa fsc fse fsf fsm fsr fss m-f m-r maa mac mae maf mam mar mas mc- mca mcc mce mcf mcm mcr mcs mea mec mee mef mem mer mes mfa mfc mfe mff mfm mfr mfs mma mmc mme mmf mmm mmr mms mra mrc mre mrf mrm mrr mrs msa msc mse msf msm msr mss ra- raa rac rae raf ram rar ras rca rcc rce rcf rcm rcr rcs re- rea rec ree ref rem rer res rfa rfc rfe rff rfm rfr rfs rma rmc rme rmf rmm rmr rms rra rrc rrf rrm rrr rrs rsa rsc rse rsf rsm rsr rss saa sac sae saf sam sar sas sca scc sce scf scm scr scs se- sea sec see sef sem ser ses sfa sfc sfe sff sfm sfr sfs sma smc sme smf smm smr sms sr- sra src sre srf srm srr srs ss- ssa ssc sse ssf ssm ssr sss