-al -er a-a a-c aaa aac aae aag aal aar aas ac- aca acc ace acg acl acr acs aea aec aee aeg ael aer aes ag- aga agc age agg agl agr ags al- ala alc ale alg all alr als ar- ara arc are arg arl arr ars as- asa asc ase asg asl asr ass c-- caa cac cae cag cal car cas cca ccc cce ccg ccl ccr ccs ce- cea cec cee ceg cel cer ces cga cgc cge cgg cgl cgr cgs cl- cla clc cle clg cll clr cls cra crc cre crg crl crr crs csa csc cse csg csl csr css eaa eac eae eag eal ear eas ec- eca ecc ece ecg ecl ecr ecs eea eec eee eeg eel eer ees ega egc ege egg egl egr egs ela elc ele elg ell elr els era erc ere erg erl err ers es- esa esc ese esg esl esr ess gaa gac gae gag gal gar gas gca gcc gce gcg gcl gcr gcs ge- gea gec gee geg gel ger ges gga ggc ggg ggr ggs gla glc gle glg gll glr gls gra grc gre grg grl grr grs gsa gsc gse gsg gsl gsr gss la- laa lac lae lag lal lar las lca lcc lce lcg lcl lcr lcs lea lec lee leg lel ler les lga lgc lge lgg lgl lgr lgs lla llc lle llg lll llr lls lra lrc lrg lrr lrs lsa lsc lse lsg lsl lsr lss ra- raa rac rae rag ral rar ras rca rcc rce rcg rcl rcr rcs re- rea rec ree reg rel rer res rga rgc rge rgg rgr rgs rla rlc rle rlg rll rlr rls rra rrc rrg rrl rrr rrs rsa rsc rse rsg rsl rsr rss saa sac sae sag sal sar sas sca scc sce scg scl scr scs se- sea sec see seg sel ser ses sga sgc sge sgg sgl sgr sgs sla slc sle slg sll slr sls sr- sra src sre srg srl srr srs ss- ssa ssc sse ssg ssl ssr sss