-er a-a a-c a-t aaa aac aae aag aao aap aar aat ac- aca acc ace acg aco acp acr act aea aec aee aeg aeo aep aer aet ag- aga agc age agg ago agp agr agt aoa aoc aoe aog aoo aop aor aot ap- apa apc ape apg apo app apr apt ar- ara arc are arg aro arp arr art at- ata atc ate atg ato atp atr att c-- caa cac cae cag cao cap car cat cca ccc cce ccg cco ccp ccr cct ce- cea cec cee ceg ceo cep cer cet cga cgc cge cgg cgo cgp cgr cgt co- coa coc coe cog coo cop cor cot cpa cpc cpe cpg cpo cpp cpr cpt cra crc cre crg cro crp crr crt cta ctc cte ctg cto ctp ctr ctt eaa eac eae eag eao eap ear eat ec- eca ecc ece ecg eco ecr ect eea eec eee eeg eeo eep eer eet ega egc ege egg ego egp egr egt eo- eoa eoc eoe eog eoo eop eor eot ep- epa epc epe epg epo epp epr ept era erc ere erg ero erp err ert eta etc ete etg eto etp etr ett g-p gaa gac gae gag gao gap gar gat gca gcc gce gcg gco gcp gcr gct ge- gea gec gee geg geo gep ger get gga ggc ggg ggo ggp ggr ggt goa goc goe gog goo gop gor got gpa gpc gpe gpg gpo gpp gpr gpt gra grc gre grg gro grp grr grt gta gtc gte gtg gto gtp gtr gtt oaa oac oae oag oao oap oar oat oc- oca occ ocg oco ocp ocr oct oea oec oee oeg oeo oep oer oet oga ogc oge ogg ogo ogp ogt oo- ooa ooc oog ooo oop oor oot op- opa opc ope opg opo opp opr opt or- ora orc ore org oro orp orr ort ot- ota otc ote otg oto otp otr ott p-p paa pac pae pag pao pap par pat pca pcc pce pcg pco pcp pcr pct pea pec pee peg peo pep per pet pga pgc pge pgg pgo pgp pgr pgt poa poc poe pog poo pop por pot ppa ppc ppe ppg ppo ppp ppr ppt pra prc pre prg pro prp prr prt pt- pta ptc pte ptg pto ptp ptr ptt ra- raa rac rae rag rao rap rar rat rca rcc rce rcg rco rcp rcr rct re- rea rec ree reg reo rep rer ret rga rgc rge rgg rgo rgp rgr rgt roa roc roe rog roo rop ror rot rpa rpc rpe rpg rpo rpp rpr rpt rra rrc rrg rrp rrr rrt rta rtc rte rtg rto rtp rtr rtt taa tac tae tag tao tap tar tat tca tcc tce tcg tco tcp tcr tct te- tea tec tee teg teo tep ter tet tga tgc tge tgg tgo tgp tgr tgt to- toa toc toe tog too top tor tot tpa tpc tpe tpg tpo tpp tpr tpt tra trc tre trg tro trp trr trt tta ttc tte ttg tto ttp ttr ttt