-er a-a a-c a-t aaa aac aae aag aak aar aat aau ac- aca acc ace acg ack acr act acu aea aec aee aeg aek aer aet aeu ag- aga agc age agg agk agr agt agu aka akc ake akg akk akr aku ar- ara arc are arg ark arr art aru at- ata atc ate atg atr att atu au- aua auc aue aug auk aur aut c-- caa cac cae cag cak car cat cau cca ccc cce ccg cck ccr cct ccu ce- cea cec cee ceg cek cer cet ceu cga cgc cge cgg cgr cgt cgu cka ckc ckt cra crc cre crg crk crr crt cru cta ctc cte ctg ctk ctr ctt ctu cua cuc cue cug cuk cur cut cuu eaa eac eae eag eak ear eat eau ec- eca ecc ece ecg eck ecr ect ecu eea eec eee eeg eek eer eet ega egc ege egg egr egt egu eka ekc eke ekg ekr ekt eku era erc ere erg erk err ert eru eta etc ete etg etk etr ett etu eu- eua euc eue eug eur eut gaa gac gae gag gak gar gat gau gca gcc gce gcg gck gcr gct gcu ge- gea gec gee geg gek ger get geu gga ggc ggg ggr ggt ggu gka gkt gra grc gre grg grk grr grt gru gta gtc gte gtg gtk gtr gtt gtu gu- gua guc gue gug guk gur gut guu k-t ka- kaa kac kae kag kak kar kat kau kca kcc kce kcg kck kcr kct kcu ke- kea kec kee keg kek ker ket kga kgc kgu kkc kke kkk kkr kkt kku kra krc krg krk krr krt kru kta ktc kte ktg ktk ktr ktt ktu kuc kue kug kuk kur kut kuu ra- raa rac rae rag rak rar rat rau rca rcc rce rcg rcr rct rcu re- rea rec ree reg rek rer ret reu rga rgc rge rgg rgk rgr rgt rkc rke rkg rkk rkt rku rra rrc rrg rrk rrr rrt rru rta rtc rte rtg rtk rtr rtt rtu rua ruc rue rug ruk rur rut ruu taa tac tae tag tak tar tat tau tca tcc tce tcg tck tcr tct tcu te- tea tec tee teg tek ter tet teu tga tgc tge tgg tgk tgr tgt tgu tka tkc tke tkg tkk tkr tkt tra trc tre trg trk trr trt tru tta ttc tte ttg ttk ttr ttt ttu tua tuc tue tug tuk tur tut tuu ua- uaa uac uae uag uak uar uat uau uca ucc uce ucg uck ucr uct ucu uea uec uee ueg uer uet uga ugc uge ugg ugk ugr ugt ugu uka ukc uke ukk ukr uku ur- ura urc ure urg urk urr urt uru uta utc ute utk utr utt utu uua uuc uue uug uur uut uuu