-er a-a a-c a-t aaa aac aae aag aak aap aar aat ac- aca acc ace acg ack acp acr act aea aec aee aeg aek aep aer aet ag- aga agc age agg agk agp agr agt aka akc ake akg akk akp akr ap- apa apc ape apg apk app apr apt ar- ara arc are arg ark arp arr art at- ata atc ate atg atp atr att c-- caa cac cae cag cak cap car cat cca ccc cce ccg cck ccp ccr cct ce- cea cec cee ceg cek cep cer cet cga cgc cge cgg cgp cgr cgt cka ckc ckt cpa cpc cpe cpg cpk cpp cpr cpt cra crc cre crg crk crp crr crt cta ctc cte ctg ctk ctp ctr ctt eaa eac eae eag eak eap ear eat ec- eca ecc ece ecg eck ecr ect eea eec eee eeg eek eep eer eet ega egc ege egg egp egr egt eka ekc eke ekg ekp ekr ekt ep- epa epc epe epg epp epr ept era erc ere erg erk erp err ert eta etc ete etg etk etp etr ett g-p gaa gac gae gag gak gap gar gat gca gcc gce gcg gck gcp gcr gct ge- gea gec gee geg gek gep ger get gga ggc ggg ggp ggr ggt gka gkp gkt gpa gpc gpe gpg gpk gpp gpr gpt gra grc gre grg grk grp grr grt gta gtc gte gtg gtk gtp gtr gtt k-t ka- kaa kac kae kag kak kap kar kat kca kcc kce kcg kck kcp kcr kct ke- kea kec kee keg kek kep ker ket kga kgc kgp kkc kke kkk kkp kkr kkt kpa kpc kpe kpk kpp kpr kpt kra krc krg krk krp krr krt kta ktc kte ktg ktk ktp ktr ktt p-p paa pac pae pag pak pap par pat pca pcc pce pcg pck pcp pcr pct pea pec pee peg pek pep per pet pga pgc pge pgg pgk pgp pgr pgt pka pkc pke pkg pkp pkr pkt ppa ppc ppe ppg ppk ppp ppr ppt pra prc pre prg prk prp prr prt pt- pta ptc pte ptg ptk ptp ptr ptt ra- raa rac rae rag rak rap rar rat rca rcc rce rcg rcp rcr rct re- rea rec ree reg rek rep rer ret rga rgc rge rgg rgk rgp rgr rgt rkc rke rkg rkk rkp rkt rpa rpc rpe rpg rpk rpp rpr rpt rra rrc rrg rrk rrp rrr rrt rta rtc rte rtg rtk rtp rtr rtt taa tac tae tag tak tap tar tat tca tcc tce tcg tck tcp tcr tct te- tea tec tee teg tek tep ter tet tga tgc tge tgg tgk tgp tgr tgt tka tkc tke tkg tkk tkp tkr tkt tpa tpc tpe tpg tpk tpp tpr tpt tra trc tre trg trk trp trr trt tta ttc tte ttg ttk ttp ttr ttt