-er a-a a-c a-t aaa aac aae aag aak aar aas aat aau ac- aca acc ace acg ack acr acs act acu aea aec aee aeg aek aer aes aet aeu ag- aga agc age agg agk agr ags agt agu aka akc ake akg akk akr aks aku ar- ara arc are arg ark arr ars art aru as- asa asc ase asg ask asr ass ast asu at- ata atc ate atg atr ats att atu au- aua auc aue aug auk aur aus aut c-- caa cac cae cag cak car cas cat cau cca ccc cce ccg cck ccr ccs cct ccu ce- cea cec cee ceg cek cer ces cet ceu cga cgc cge cgg cgr cgs cgt cgu cka ckc cks ckt cra crc cre crg crk crr crs crt cru csa csc cse csg csk csr css cst csu cta ctc cte ctg ctk ctr cts ctt ctu cua cuc cue cug cuk cur cus cut cuu eaa eac eae eag eak ear eas eat eau ec- eca ecc ece ecg eck ecr ecs ect ecu eea eec eee eeg eek eer ees eet ega egc ege egg egr egs egt egu eka ekc eke ekg ekr eks ekt eku era erc ere erg erk err ers ert eru es- esa esc ese esg esk esr ess est esu eta etc ete etg etk etr ets ett etu eu- eua euc eue eug eur eus eut gaa gac gae gag gak gar gas gat gau gca gcc gce gcg gck gcr gcs gct gcu ge- gea gec gee geg gek ger ges get geu gga ggc ggg ggr ggs ggt ggu gka gks gkt gra grc gre grg grk grr grs grt gru gsa gsc gse gsg gsk gsr gss gst gsu gta gtc gte gtg gtk gtr gts gtt gtu gu- gua guc gue gug guk gur gus gut guu k-t ka- kaa kac kae kag kak kar kas kat kau kca kcc kce kcg kck kcr kcs kct kcu ke- kea kec kee keg kek ker kes ket kga kgc kgs kgu kkc kke kkk kkr kks kkt kku kra krc krg krk krr krs krt kru ksa ksc kse ksg ksk ksr kss kst ksu kta ktc kte ktg ktk ktr kts ktt ktu kuc kue kug kuk kur kus kut kuu ra- raa rac rae rag rak rar ras rat rau rca rcc rce rcg rcr rcs rct rcu re- rea rec ree reg rek rer res ret reu rga rgc rge rgg rgk rgr rgs rgt rkc rke rkg rkk rks rkt rku rra rrc rrg rrk rrr rrs rrt rru rsa rsc rse rsg rsk rsr rss rst rsu rta rtc rte rtg rtk rtr rts rtt rtu rua ruc rue rug ruk rur rus rut ruu saa sac sae sag sak sar sas sat sau sca scc sce scg sck scr scs sct scu se- sea sec see seg sek ser ses set seu sga sgc sge sgg sgk sgr sgs sgt sgu sk- ska skc ske skg skk skr sks skt sku sr- sra src sre srg srk srr srs srt ss- ssa ssc sse ssg ssk ssr sss sst ssu sta stc ste stg stk str sts stt stu sua suc sue sug suk sur sus sut suu taa tac tae tag tak tar tas tat tau tca tcc tce tcg tck tcr tcs tct tcu te- tea tec tee teg tek ter tes tet teu tga tgc tge tgg tgk tgr tgs tgt tgu tka tkc tke tkg tkk tkr tks tkt tra trc tre trg trk trr trs trt tru tsa tsc tse tsg tsk tsr tss tst tsu tta ttc tte ttg ttk ttr tts ttt ttu tua tuc tue tug tuk tur tus tut tuu ua- uaa uac uae uag uak uar uas uat uau uca ucc uce ucg uck ucr ucs uct ucu uea uec uee ueg uer ues uet uga ugc uge ugg ugk ugr ugs ugt ugu uka ukc uke ukk ukr uku ur- ura urc ure urg urk urr urs urt uru usa usc use usg usk usr uss ust usu uta utc ute utk utr uts utt utu uua uuc uue uug uur uus uut uuu