-er a-a a-c aaa aac aae aag aam aap aar aas ac- aca acc ace acg acm acp acr acs aea aec aee aeg aem aep aer aes ag- aga agc age agg agm agp agr ags ama amc ame amg amm amp amr ams ap- apa apc ape apg apm app apr aps ar- ara arc are arg arm arp arr ars as- asa asc ase asg asm asp asr ass c-- caa cac cae cag cam cap car cas cca ccc cce ccg ccm ccp ccr ccs ce- cea cec cee ceg cem cep cer ces cga cgc cge cgg cgm cgp cgr cgs cma cmc cme cmg cmm cmp cmr cms cpa cpc cpe cpg cpm cpp cpr cps cra crc cre crg crm crp crr crs csa csc cse csg csm csp csr css eaa eac eae eag eam eap ear eas ec- eca ecc ece ecg ecm ecr ecs eea eec eee eeg eem eep eer ees ega egc ege egg egm egp egr egs em- ema emc eme emg emm emp emr ems ep- epa epc epe epg epm epp epr eps era erc ere erg erm erp err ers es- esa esc ese esg esm esp esr ess g-p gaa gac gae gag gam gap gar gas gca gcc gce gcg gcm gcp gcr gcs ge- gea gec gee geg gem gep ger ges gga ggc ggg ggm ggp ggr ggs gma gmc gme gmg gmm gmp gmr gms gpa gpc gpe gpg gpm gpp gpr gps gra grc gre grg grm grp grr grs gsa gsc gse gsg gsm gsp gsr gss m-r maa mac mae mag mam map mar mas mc- mca mcc mce mcg mcm mcp mcr mcs mea mec mee meg mem mep mer mes mga mgc mge mgm mgp mgr mgs mma mmc mme mmg mmm mmp mmr mms mpa mpc mpe mpg mpm mpp mpr mps mra mrc mre mrg mrm mrp mrr mrs msa msc mse msg msm msp msr mss p-p paa pac pae pag pam pap par pas pca pcc pce pcg pcm pcp pcr pcs pea pec pee peg pem pep per pes pga pgc pge pgg pgm pgp pgr pgs pma pmc pme pmg pmm pmp pmr pms ppa ppc ppe ppg ppm ppp ppr pps pra prc pre prg prm prp prr prs ps- psa psc pse psg psm psp psr pss ra- raa rac rae rag ram rap rar ras rca rcc rce rcg rcm rcp rcr rcs re- rea rec ree reg rem rep rer res rga rgc rge rgg rgp rgr rgs rma rmc rme rmg rmm rmp rmr rms rpa rpc rpe rpg rpm rpp rpr rps rra rrc rrg rrm rrp rrr rrs rsa rsc rse rsg rsm rsp rsr rss saa sac sae sag sam sap sar sas sca scc sce scg scm scp scr scs se- sea sec see seg sem sep ser ses sga sgc sge sgg sgm sgp sgr sgs sma smc sme smg smm smp smr sms spa spc spe spg spm spp spr sps sr- sra src sre srg srm srp srr srs ss- ssa ssc sse ssg ssm ssp ssr sss