-er a-a a-c a-t aaa aac aae aag aak aap aar aas aat ac- aca acc ace acg ack acp acr acs act aea aec aee aeg aek aep aer aes aet ag- aga agc age agg agk agp agr ags agt aka akc ake akg akk akp akr aks ap- apa apc ape apg apk app apr aps apt ar- ara arc are arg ark arp arr ars art as- asa asc ase asg ask asp asr ass ast at- ata atc ate atg atp atr ats att c-- caa cac cae cag cak cap car cas cat cca ccc cce ccg cck ccp ccr ccs cct ce- cea cec cee ceg cek cep cer ces cet cga cgc cge cgg cgp cgr cgs cgt cka ckc cks ckt cpa cpc cpe cpg cpk cpp cpr cps cpt cra crc cre crg crk crp crr crs crt csa csc cse csg csk csp csr css cst cta ctc cte ctg ctk ctp ctr cts ctt eaa eac eae eag eak eap ear eas eat ec- eca ecc ece ecg eck ecr ecs ect eea eec eee eeg eek eep eer ees eet ega egc ege egg egp egr egs egt eka ekc eke ekg ekp ekr eks ekt ep- epa epc epe epg epp epr eps ept era erc ere erg erk erp err ers ert es- esa esc ese esg esk esp esr ess est eta etc ete etg etk etp etr ets ett g-p gaa gac gae gag gak gap gar gas gat gca gcc gce gcg gck gcp gcr gcs gct ge- gea gec gee geg gek gep ger ges get gga ggc ggg ggp ggr ggs ggt gka gkp gks gkt gpa gpc gpe gpg gpk gpp gpr gps gpt gra grc gre grg grk grp grr grs grt gsa gsc gse gsg gsk gsp gsr gss gst gta gtc gte gtg gtk gtp gtr gts gtt k-t ka- kaa kac kae kag kak kap kar kas kat kca kcc kce kcg kck kcp kcr kcs kct ke- kea kec kee keg kek kep ker kes ket kga kgc kgp kgs kkc kke kkk kkp kkr kks kkt kpa kpc kpe kpk kpp kpr kps kpt kra krc krg krk krp krr krs krt ksa ksc kse ksg ksk ksp ksr kss kst kta ktc kte ktg ktk ktp ktr kts ktt p-p paa pac pae pag pak pap par pas pat pca pcc pce pcg pck pcp pcr pcs pct pea pec pee peg pek pep per pes pet pga pgc pge pgg pgk pgp pgr pgs pgt pka pkc pke pkg pkp pkr pks pkt ppa ppc ppe ppg ppk ppp ppr pps ppt pra prc pre prg prk prp prr prs prt ps- psa psc pse psg psk psp psr pss pst pt- pta ptc pte ptg ptk ptp ptr pts ptt ra- raa rac rae rag rak rap rar ras rat rca rcc rce rcg rcp rcr rcs rct re- rea rec ree reg rek rep rer res ret rga rgc rge rgg rgk rgp rgr rgs rgt rkc rke rkg rkk rkp rks rkt rpa rpc rpe rpg rpk rpp rpr rps rpt rra rrc rrg rrk rrp rrr rrs rrt rsa rsc rse rsg rsk rsp rsr rss rst rta rtc rte rtg rtk rtp rtr rts rtt saa sac sae sag sak sap sar sas sat sca scc sce scg sck scp scr scs sct se- sea sec see seg sek sep ser ses set sga sgc sge sgg sgk sgp sgr sgs sgt sk- ska skc ske skg skk skp skr sks skt spa spc spe spg spk spp spr sps spt sr- sra src sre srg srk srp srr srs srt ss- ssa ssc sse ssg ssk ssp ssr sss sst sta stc ste stg stk stp str sts stt taa tac tae tag tak tap tar tas tat tca tcc tce tcg tck tcp tcr tcs tct te- tea tec tee teg tek tep ter tes tet tga tgc tge tgg tgk tgp tgr tgs tgt tka tkc tke tkg tkk tkp tkr tks tkt tpa tpc tpe tpg tpk tpp tpr tps tpt tra trc tre trg trk trp trr trs trt tsa tsc tse tsg tsk tsp tsr tss tst tta ttc tte ttg ttk ttp ttr tts ttt