-er a-a a-c a-t aaa aac aae aag aak aao aar aat aau ac- aca acc ace acg ack aco acr act acu aea aec aee aeg aek aeo aer aet aeu ag- aga agc age agg agk ago agr agt agu aka akc ake akg akk ako akr aku aoa aoc aoe aog aok aoo aor aot aou ar- ara arc are arg ark aro arr art aru at- ata atc ate atg ato atr att atu au- aua auc aue aug auk auo aur aut c-- caa cac cae cag cak cao car cat cau cca ccc cce ccg cck cco ccr cct ccu ce- cea cec cee ceg cek ceo cer cet ceu cga cgc cge cgg cgo cgr cgt cgu cka ckc cko ckt co- coa coc coe cog cok coo cor cot cou cra crc cre crg crk cro crr crt cru cta ctc cte ctg ctk cto ctr ctt ctu cua cuc cue cug cuk cuo cur cut cuu eaa eac eae eag eak eao ear eat eau ec- eca ecc ece ecg eck eco ecr ect ecu eea eec eee eeg eek eeo eer eet ega egc ege egg ego egr egt egu eka ekc eke ekg eko ekr ekt eku eo- eoa eoc eoe eog eok eoo eor eot eou era erc ere erg erk ero err ert eru eta etc ete etg etk eto etr ett etu eu- eua euc eue eug eur eut gaa gac gae gag gak gao gar gat gau gca gcc gce gcg gck gco gcr gct gcu ge- gea gec gee geg gek geo ger get geu gga ggc ggg ggo ggr ggt ggu gka gko gkt goa goc goe gog gok goo gor got gou gra grc gre grg grk gro grr grt gru gta gtc gte gtg gtk gto gtr gtt gtu gu- gua guc gue gug guk guo gur gut guu k-t ka- kaa kac kae kag kak kao kar kat kau kca kcc kce kcg kck kcr kct kcu ke- kea kec kee keg kek keo ker ket kga kgc kgo kgu kkc kke kkk kkr kkt kku koa koc koe kog kok koo kor kot kou kra krc krg krk kro krr krt kru kta ktc kte ktg ktk kto ktr ktt ktu kuc kue kug kuk kur kut kuu oaa oac oae oag oak oao oar oat oau oc- oca occ ocg ock oco ocr oct ocu oea oec oee oeg oeo oer oet oga ogc oge ogg ogo ogt oka okc oke okg okk oko okr oku oo- ooa ooc oog ook ooo oor oot or- ora orc ore org ork oro orr ort oru ot- ota otc ote otg otk oto otr ott otu ou- oua ouc oue ouk ouo our out ra- raa rac rae rag rak rao rar rat rau rca rcc rce rcg rco rcr rct rcu re- rea rec ree reg rek reo rer ret reu rga rgc rge rgg rgk rgo rgr rgt rkc rke rkg rkk rko rkt rku roa roc roe rog rok roo ror rot rou rra rrc rrg rrk rrr rrt rru rta rtc rte rtg rtk rto rtr rtt rtu rua ruc rue rug ruk ruo rur rut ruu taa tac tae tag tak tao tar tat tau tca tcc tce tcg tck tco tcr tct tcu te- tea tec tee teg tek teo ter tet teu tga tgc tge tgg tgk tgo tgr tgt tgu tka tkc tke tkg tkk tko tkr tkt to- toa toc toe tog tok too tor tot tou tra trc tre trg trk tro trr trt tru tta ttc tte ttg ttk tto ttr ttt ttu tua tuc tue tug tuk tuo tur tut tuu ua- uaa uac uae uag uak uao uar uat uau uca ucc uce ucg uck uco ucr uct ucu uea uec uee ueg uer uet uga ugc uge ugg ugk ugo ugr ugt ugu uka ukc uke ukk ukr uku uoa uoc uoe uog uok uoo uor uot ur- ura urc ure urg urk uro urr urt uru uta utc ute utk uto utr utt utu uua uuc uue uug uur uut uuu