-er -ey a-a a-c aaa aac aae aag aar aas aay ac- aca acc ace acg acr acs acy aea aec aee aeg aer aes aey ag- aga agc age agg agr ags agy ar- ara arc are arg arr ars ary as- asa asc ase asg asr ass asy ay- aya ayc aye ayr ays c-- caa cac cae cag car cas cay cca ccc cce ccg ccr ccs ce- cea cec cee ceg cer ces cey cga cgc cge cgg cgr cgs cgy cra crc cre crg crr crs cry csa csc cse csg csr css csy cya cyc cye cyg cyr cys eaa eac eae eag ear eas ec- eca ecc ece ecg ecr ecs eea eec eee eeg eer ees eey ega egc ege egg egr egs egy era erc ere erg err ers ery es- esa esc ese esg esr ess esy eya eyc eye eyr eys gaa gac gae gag gar gas gay gca gcc gce gcg gcr gcs ge- gea gec gee geg ger ges gey gga ggc ggg ggr ggs gra grc gre grg grr grs gry gsa gsc gse gsg gsr gss gy- gya gye gyr gys ra- raa rac rae rag rar ras ray rca rcc rce rcg rcr rcs re- rea rec ree reg rer res rey rga rgc rge rgg rgr rgs rra rrc rrg rrr rrs rsa rsc rse rsg rsr rss ry- rya ryc rye ryg ryr rys ryy saa sac sae sag sar sas say sca scc sce scg scr scs se- sea sec see seg ser ses sey sga sgc sge sgg sgr sgs sr- sra src sre srg srr srs sry ss- ssa ssc sse ssg ssr sss sy- sya syc sye syg syr sys yaa yac yae yag yar yas yay yca ycc yce ycs ycy yea yec yee yeg yer yes yey yga ygc yra yrc yre yrg yrs ysa ysc yse ysg ysr yss ysy yyc yye yyg yys yyy