-er a-a a-c aaa aac aae aag aam aap aar ac- aca acc ace acg acm acp acr aea aec aee aeg aem aep aer ag- aga agc age agg agm agp agr ama amc ame amg amm amp amr ap- apa apc ape apg apm app apr ar- ara arc are arg arm arp arr c-- caa cac cae cag cam cap car cca ccc cce ccg ccm ccp ccr ce- cea cec cee ceg cem cep cer cga cgc cge cgg cgm cgp cgr cma cmc cme cmg cmm cmp cmr cpa cpc cpe cpg cpm cpp cpr cra crc cre crg crm crp crr eaa eac eae eag eam eap ear ec- eca ecc ece ecg ecm ecr eea eec eee eeg eem eep eer ega egc ege egg egm egp egr em- ema emc eme emg emm emp emr ep- epa epc epe epg epm epp epr era erc ere erg erm erp err g-p gaa gac gae gag gam gap gar gca gcc gce gcg gcm gcp gcr ge- gea gec gee geg gem gep ger gga ggc ggg ggm ggp ggr gma gmc gme gmg gmm gmp gmr gpa gpc gpe gpg gpm gpp gpr gra grc gre grg grm grp grr m-r maa mac mae mag mam map mar mc- mca mcc mce mcg mcm mcp mcr mea mec mee meg mem mep mer mga mgc mge mgm mgp mgr mma mmc mme mmg mmm mmp mmr mpa mpc mpe mpg mpm mpp mpr mra mrc mre mrg mrm mrp mrr p-p paa pac pae pag pam pap par pca pcc pce pcg pcm pcp pcr pea pec pee peg pem pep per pga pgc pge pgg pgm pgp pgr pma pmc pme pmg pmm pmp pmr ppa ppc ppe ppg ppm ppp ppr pra prc pre prg prm prp prr ra- raa rac rae rag ram rap rar rca rcc rce rcg rcm rcp rcr re- rea rec ree reg rem rep rer rga rgc rge rgg rgp rgr rma rmc rme rmg rmm rmp rmr rpa rpc rpe rpg rpm rpp rpr rra rrc rrg rrm rrp rrr