-er a-a a-c a-t aaa aac aae aag aak aan aar aat aau ac- aca acc ace acg ack acn acr act acu aea aec aee aeg aek aen aer aet aeu ag- aga agc age agg agk agn agr agt agu aka akc ake akg akk akn akr aku an- ana anc ane ang ank ann anr ant anu ar- ara arc are arg ark arn arr art aru at- ata atc ate atg atn atr att atu au- aua auc aue aug auk aun aur aut c-- caa cac cae cag cak can car cat cau cca ccc cce ccg cck ccn ccr cct ccu ce- cea cec cee ceg cek cen cer cet ceu cga cgc cge cgg cgn cgr cgt cgu cka ckc ckt cn- cna cnc cne cng cnn cnr cnt cnu cra crc cre crg crk crn crr crt cru cta ctc cte ctg ctk ctn ctr ctt ctu cua cuc cue cug cuk cun cur cut cuu eaa eac eae eag eak ean ear eat eau ec- eca ecc ece ecg eck ecn ecr ect ecu eea eec eee eeg eek een eer eet ega egc ege egg egn egr egt egu eka ekc eke ekg ekr ekt eku en- ena enc ene eng enk enn enr ent enu era erc ere erg erk ern err ert eru eta etc ete etg etk etn etr ett etu eu- eua euc eue eug eun eur eut gaa gac gae gag gak gan gar gat gau gca gcc gce gcg gck gcn gcr gct gcu ge- gea gec gee geg gek gen ger get geu gga ggc ggg ggn ggr ggt ggu gka gkn gkt gna gnc gne gnn gnr gnt gnu gra grc gre grg grk grn grr grt gru gta gtc gte gtg gtk gtn gtr gtt gtu gu- gua guc gue gug guk gun gur gut guu k-t ka- kaa kac kae kag kak kan kar kat kau kca kcc kce kcg kck kcn kcr kct kcu ke- kea kec kee keg kek ken ker ket kga kgc kgu kkc kke kkk kkn kkr kkt kku kn- kna knc kne kng knk knn knr knt knu kra krc krg krk krn krr krt kru kta ktc kte ktg ktk ktn ktr ktt ktu kuc kue kug kuk kun kur kut kuu naa nac nae nag nak nan nar nat nau nca ncc nce ncg nck ncn ncr nct ncu ne- nea nec nee neg nek nen ner net neu nga ngc nge ngg ngk ngn ngt ngu nka nkc nke nkk nkn nkr nkt nku nna nnc nne nng nnk nnn nnt nnu nra nrc nre nrg nrk nrn nrr nrt nru nta ntc nte ntg ntk ntn ntr ntt ntu nua nuc nue nug nuk nun nur nut nuu ra- raa rac rae rag rak ran rar rat rau rca rcc rce rcg rcn rcr rct rcu re- rea rec ree reg rek ren rer ret reu rga rgc rge rgg rgk rgn rgr rgt rkc rke rkg rkk rkt rku rna rnc rng rnn rnr rnt rnu rra rrc rrg rrk rrn rrr rrt rru rta rtc rte rtg rtk rtn rtr rtt rtu rua ruc rue rug ruk run rur rut ruu taa tac tae tag tak tan tar tat tau tca tcc tce tcg tck tcn tcr tct tcu te- tea tec tee teg tek ten ter tet teu tga tgc tge tgg tgk tgn tgr tgt tgu tka tkc tke tkg tkk tkr tkt tna tnc tne tng tnk tnn tnr tnt tra trc tre trg trk trn trr trt tru tta ttc tte ttg ttk ttn ttr ttt ttu tua tuc tue tug tuk tun tur tut tuu ua- uaa uac uae uag uak uan uar uat uau uca ucc uce ucg uck ucn ucr uct ucu uea uec uee ueg uen uer uet uga ugc uge ugg ugk ugn ugr ugt ugu uka ukc uke ukk ukn ukr uku un- una unc une ung unk unn unr unt unu ur- ura urc ure urg urk urn urr urt uru uta utc ute utk utn utr utt utu uua uuc uue uug uun uur uut uuu