-er a-a a-c a-t aaa aac aae aag aaj aao aar aat ac- aca acc ace acg acj aco acr act aea aec aee aeg aej aeo aer aet ag- aga agc age agg agj ago agr agt aja ajc aje ajj ajo ajr ajt aoa aoc aoe aog aoj aoo aor aot ar- ara arc are arg arj aro arr art at- ata atc ate atg ato atr att c-- c-j caa cac cae cag caj cao car cat cca ccc cce ccg ccj cco ccr cct ce- cea cec cee ceg cej ceo cer cet cga cgc cge cgg cgo cgr cgt cja cjc cjg cjr co- coa coc coe cog coj coo cor cot cra crc cre crg crj cro crr crt cta ctc cte ctg cto ctr ctt eaa eac eae eag eaj eao ear eat ec- eca ecc ece ecg ecj eco ecr ect eea eec eee eeg eeo eer eet ega egc ege egg ego egr egt eja ejc ejo ejt eo- eoa eoc eoe eog eoo eor eot era erc ere erg ero err ert eta etc ete etg etj eto etr ett gaa gac gae gag gaj gao gar gat gca gcc gce gcg gco gcr gct ge- gea gec gee geg geo ger get gga ggc ggg ggj ggo ggr ggt gja gjc gje gjg gjr gjt goa goc goe gog goo gor got gra grc gre grg grj gro grr grt gta gtc gte gtg gto gtr gtt jaa jac jae jag jaj jao jar jat jca jcc jce jco jcr jct jea jec jee jeg jej jeo jer jet jga jge jgo jgr jgt jja jjc jjg jjj jjr joa joc joe jog joj joo jor jot jra jrc jrg jro jrr jrt jta jtc jte jtg jtr jtt oaa oac oae oag oaj oao oar oat oc- oca occ ocg ocj oco ocr oct oea oec oee oeg oeo oer oet oga ogc oge ogg ogo ogt oja ojc oje ojo oo- ooa ooc oog ooo oor oot or- ora orc ore org oro orr ort ot- ota otc ote otg oto otr ott ra- raa rac rae rag raj rao rar rat rca rcc rce rcg rcj rco rcr rct re- rea rec ree reg reo rer ret rga rgc rge rgg rgo rgr rgt rja rjc rjg rjr roa roc roe rog roj roo ror rot rra rrc rrg rrr rrt rta rtc rte rtg rtj rto rtr rtt taa tac tae tag taj tao tar tat tca tcc tce tcg tcj tco tcr tct te- tea tec tee teg tej teo ter tet tga tgc tge tgg tgo tgr tgt tjc tje tjo tjr to- toa toc toe tog toj too tor tot tra trc tre trg tro trr trt tta ttc tte ttg tto ttr ttt