-al -er -ol a-a a-c aaa aac aae aag aal aao aar aas ac- aca acc ace acg acl aco acr acs aea aec aee aeg ael aeo aer aes ag- aga agc age agg agl ago agr ags al- ala alc ale alg all alo alr als aoa aoc aoe aog aol aoo aor aos ar- ara arc are arg arl aro arr ars as- asa asc ase asg asl aso asr ass c-- caa cac cae cag cal cao car cas cca ccc cce ccg ccl cco ccr ccs ce- cea cec cee ceg cel ceo cer ces cga cgc cge cgg cgl cgo cgr cgs cl- cla clc cle clg cll clo clr cls co- coa coc coe cog col coo cor cos cra crc cre crg crl cro crr crs csa csc cse csg csl cso csr css eaa eac eae eag eal eao ear eas ec- eca ecc ece ecg ecl eco ecr ecs eea eec eee eeg eel eeo eer ees ega egc ege egg egl ego egr egs ela elc ele elg ell elo elr els eo- eoa eoc eoe eog eol eoo eor eos era erc ere erg erl ero err ers es- esa esc ese esg esl eso esr ess gaa gac gae gag gal gao gar gas gca gcc gce gcg gcl gco gcr gcs ge- gea gec gee geg gel geo ger ges gga ggc ggg ggo ggr ggs gla glc gle glg gll glo glr gls goa goc goe gog gol goo gor gos gra grc gre grg grl gro grr grs gsa gsc gse gsg gsl gso gsr gss la- laa lac lae lag lal lao lar las lca lcc lce lcg lcl lco lcr lcs lea lec lee leg lel leo ler les lga lgc lge lgg lgl lgo lgr lgs lla llc lle llg lll llo llr lls loa loc loe log lol loo lor los lra lrc lrg lro lrr lrs lsa lsc lse lsg lsl lso lsr lss oaa oac oae oag oal oao oar oas oc- oca occ ocg ocl oco ocr ocs oea oec oee oeg oel oeo oer oes oga ogc oge ogg ogl ogo ogs ola olc ole olg oll olo ols oo- ooa ooc oog ool ooo oor oos or- ora orc ore org orl oro orr ors os- osa osc ose osg osl oso osr oss ra- raa rac rae rag ral rao rar ras rca rcc rce rcg rcl rco rcr rcs re- rea rec ree reg rel reo rer res rga rgc rge rgg rgo rgr rgs rla rlc rle rlg rll rlo rlr rls roa roc roe rog rol roo ror ros rra rrc rrg rrl rrr rrs rsa rsc rse rsg rsl rso rsr rss saa sac sae sag sal sao sar sas sca scc sce scg scl sco scr scs se- sea sec see seg sel seo ser ses sga sgc sge sgg sgl sgo sgr sgs sla slc sle slg sll slo slr sls soa soc soe sog sol soo sor sos sr- sra src sre srg srl sro srr srs ss- ssa ssc sse ssg ssl sso ssr sss