-al -er a-a a-c aaa aac aae aag aak aal aar aas ac- aca acc ace acg ack acl acr acs aea aec aee aeg aek ael aer aes ag- aga agc age agg agk agl agr ags aka akc ake akg akk akl akr aks al- ala alc ale alg alk all alr als ar- ara arc are arg ark arl arr ars as- asa asc ase asg ask asl asr ass c-- caa cac cae cag cak cal car cas cca ccc cce ccg cck ccl ccr ccs ce- cea cec cee ceg cek cel cer ces cga cgc cge cgg cgl cgr cgs cka ckc cks cl- cla clc cle clg clk cll clr cls cra crc cre crg crk crl crr crs csa csc cse csg csk csl csr css eaa eac eae eag eak eal ear eas ec- eca ecc ece ecg eck ecl ecr ecs eea eec eee eeg eek eel eer ees ega egc ege egg egl egr egs eka ekc eke ekg ekl ekr eks ela elc ele elg elk ell elr els era erc ere erg erk erl err ers es- esa esc ese esg esk esl esr ess gaa gac gae gag gak gal gar gas gca gcc gce gcg gck gcl gcr gcs ge- gea gec gee geg gek gel ger ges gga ggc ggg ggr ggs gka gks gla glc gle glg glk gll glr gls gra grc gre grg grk grl grr grs gsa gsc gse gsg gsk gsl gsr gss ka- kaa kac kae kag kak kal kar kas kca kcc kce kcg kck kcl kcr kcs ke- kea kec kee keg kek kel ker kes kga kgc kgl kgs kkc kke kkk kkl kkr kks kl- kla klc klg klr kls kra krc krg krk krl krr krs ksa ksc kse ksg ksk ksl ksr kss la- laa lac lae lag lak lal lar las lca lcc lce lcg lck lcl lcr lcs lea lec lee leg lek lel ler les lga lgc lge lgg lgk lgl lgr lgs lka lkg lkl lkr lks lla llc lle llg llk lll llr lls lra lrc lrg lrk lrr lrs lsa lsc lse lsg lsk lsl lsr lss ra- raa rac rae rag rak ral rar ras rca rcc rce rcg rcl rcr rcs re- rea rec ree reg rek rel rer res rga rgc rge rgg rgk rgr rgs rkc rke rkg rkk rks rla rlc rle rlg rll rlr rls rra rrc rrg rrk rrl rrr rrs rsa rsc rse rsg rsk rsl rsr rss saa sac sae sag sak sal sar sas sca scc sce scg sck scl scr scs se- sea sec see seg sek sel ser ses sga sgc sge sgg sgk sgl sgr sgs sk- ska skc ske skg skk skl skr sks sla slc sle slg slk sll slr sls sr- sra src sre srg srk srl srr srs ss- ssa ssc sse ssg ssk ssl ssr sss