-er a-a a-c a-t aaa aac aae aag aak aao aap aar aas aat ac- aca acc ace acg ack aco acp acr acs act aea aec aee aeg aek aeo aep aer aes aet ag- aga agc age agg agk ago agp agr ags agt aka akc ake akg akk ako akp akr aks aoa aoc aoe aog aok aoo aop aor aos aot ap- apa apc ape apg apk apo app apr aps apt ar- ara arc are arg ark aro arp arr ars art as- asa asc ase asg ask aso asp asr ass ast at- ata atc ate atg ato atp atr ats att c-- caa cac cae cag cak cao cap car cas cat cca ccc cce ccg cck cco ccp ccr ccs cct ce- cea cec cee ceg cek ceo cep cer ces cet cga cgc cge cgg cgo cgp cgr cgs cgt cka ckc cko cks ckt co- coa coc coe cog cok coo cop cor cos cot cpa cpc cpe cpg cpk cpo cpp cpr cps cpt cra crc cre crg crk cro crp crr crs crt csa csc cse csg csk cso csp csr css cst cta ctc cte ctg ctk cto ctp ctr cts ctt eaa eac eae eag eak eao eap ear eas eat ec- eca ecc ece ecg eck eco ecr ecs ect eea eec eee eeg eek eeo eep eer ees eet ega egc ege egg ego egp egr egs egt eka ekc eke ekg eko ekp ekr eks ekt eo- eoa eoc eoe eog eok eoo eop eor eos eot ep- epa epc epe epg epo epp epr eps ept era erc ere erg erk ero erp err ers ert es- esa esc ese esg esk eso esp esr ess est eta etc ete etg etk eto etp etr ets ett g-p gaa gac gae gag gak gao gap gar gas gat gca gcc gce gcg gck gco gcp gcr gcs gct ge- gea gec gee geg gek geo gep ger ges get gga ggc ggg ggo ggp ggr ggs ggt gka gko gkp gks gkt goa goc goe gog gok goo gop gor gos got gpa gpc gpe gpg gpk gpo gpp gpr gps gpt gra grc gre grg grk gro grp grr grs grt gsa gsc gse gsg gsk gso gsp gsr gss gst gta gtc gte gtg gtk gto gtp gtr gts gtt k-t ka- kaa kac kae kag kak kao kap kar kas kat kca kcc kce kcg kck kcp kcr kcs kct ke- kea kec kee keg kek keo kep ker kes ket kga kgc kgo kgp kgs kkc kke kkk kkp kkr kks kkt koa koc koe kog kok koo kop kor kos kot kpa kpc kpe kpk kpo kpp kpr kps kpt kra krc krg krk kro krp krr krs krt ksa ksc kse ksg ksk kso ksp ksr kss kst kta ktc kte ktg ktk kto ktp ktr kts ktt oaa oac oae oag oak oao oap oar oas oat oc- oca occ ocg ock oco ocp ocr ocs oct oea oec oee oeg oeo oep oer oes oet oga ogc oge ogg ogo ogp ogs ogt oka okc oke okg okk oko okp okr oks oo- ooa ooc oog ook ooo oop oor oos oot op- opa opc ope opg opk opo opp opr ops opt or- ora orc ore org ork oro orp orr ors ort os- osa osc ose osg osk oso osp osr oss ost ot- ota otc ote otg otk oto otp otr ots ott p-p paa pac pae pag pak pao pap par pas pat pca pcc pce pcg pck pco pcp pcr pcs pct pea pec pee peg pek peo pep per pes pet pga pgc pge pgg pgk pgo pgp pgr pgs pgt pka pkc pke pkg pko pkp pkr pks pkt poa poc poe pog pok poo pop por pos pot ppa ppc ppe ppg ppk ppo ppp ppr pps ppt pra prc pre prg prk pro prp prr prs prt ps- psa psc pse psg psk pso psp psr pss pst pt- pta ptc pte ptg ptk pto ptp ptr pts ptt ra- raa rac rae rag rak rao rap rar ras rat rca rcc rce rcg rco rcp rcr rcs rct re- rea rec ree reg rek reo rep rer res ret rga rgc rge rgg rgk rgo rgp rgr rgs rgt rkc rke rkg rkk rko rkp rks rkt roa roc roe rog rok roo rop ror ros rot rpa rpc rpe rpg rpk rpo rpp rpr rps rpt rra rrc rrg rrk rrp rrr rrs rrt rsa rsc rse rsg rsk rso rsp rsr rss rst rta rtc rte rtg rtk rto rtp rtr rts rtt saa sac sae sag sak sao sap sar sas sat sca scc sce scg sck sco scp scr scs sct se- sea sec see seg sek seo sep ser ses set sga sgc sge sgg sgk sgo sgp sgr sgs sgt sk- ska skc ske skg skk sko skp skr sks skt soa soc soe sog sok soo sop sor sos sot spa spc spe spg spk spo spp spr sps spt sr- sra src sre srg srk sro srp srr srs srt ss- ssa ssc sse ssg ssk sso ssp ssr sss sst sta stc ste stg stk sto stp str sts stt taa tac tae tag tak tao tap tar tas tat tca tcc tce tcg tck tco tcp tcr tcs tct te- tea tec tee teg tek teo tep ter tes tet tga tgc tge tgg tgk tgo tgp tgr tgs tgt tka tkc tke tkg tkk tko tkp tkr tks tkt to- toa toc toe tog tok too top tor tos tot tpa tpc tpe tpg tpk tpo tpp tpr tps tpt tra trc tre trg trk tro trp trr trs trt tsa tsc tse tsg tsk tso tsp tsr tss tst tta ttc tte ttg ttk tto ttp ttr tts ttt