-er a-a a-c a-t aaa aac aae aag aam aan aar aat ac- aca acc ace acg acm acn acr act aea aec aee aeg aem aen aer aet ag- aga agc age agg agm agn agr agt ama amc ame amg amm amn amr amt an- ana anc ane ang anm ann anr ant ar- ara arc are arg arm arn arr art at- ata atc ate atg atm atn atr att c-- caa cac cae cag cam can car cat cca ccc cce ccg ccm ccn ccr cct ce- cea cec cee ceg cem cen cer cet cga cgc cge cgg cgm cgn cgr cgt cma cmc cme cmg cmm cmn cmr cmt cn- cna cnc cne cng cnm cnn cnr cnt cra crc cre crg crm crn crr crt cta ctc cte ctg ctm ctn ctr ctt eaa eac eae eag eam ean ear eat ec- eca ecc ece ecg ecm ecn ecr ect eea eec eee eeg eem een eer eet ega egc ege egg egm egn egr egt em- ema emc eme emg emm emn emr emt en- ena enc ene eng enm enn enr ent era erc ere erg erm ern err ert eta etc ete etg etm etn etr ett gaa gac gae gag gam gan gar gat gca gcc gce gcg gcm gcn gcr gct ge- gea gec gee geg gem gen ger get gga ggc ggg ggm ggn ggr ggt gma gmc gme gmg gmm gmn gmr gmt gna gnc gne gnm gnn gnr gnt gra grc gre grg grm grn grr grt gta gtc gte gtg gtm gtn gtr gtt m-r maa mac mae mag mam man mar mat mc- mca mcc mce mcg mcm mcn mcr mct mea mec mee meg mem men mer met mga mgc mge mgm mgn mgr mgt mma mmc mme mmg mmm mmn mmr mmt mna mnc mne mng mnm mnn mnr mnt mra mrc mre mrg mrm mrn mrr mrt mta mtc mte mtg mtm mtn mtr mtt naa nac nae nag nam nan nar nat nca ncc nce ncg ncm ncn ncr nct ne- nea nec nee neg nem nen ner net nga ngc nge ngg ngm ngn ngt nma nmc nme nmg nmm nmn nmr nmt nna nnc nne nng nnm nnn nnt nra nrc nre nrg nrm nrn nrr nrt nta ntc nte ntg ntm ntn ntr ntt ra- raa rac rae rag ram ran rar rat rca rcc rce rcg rcm rcn rcr rct re- rea rec ree reg rem ren rer ret rga rgc rge rgg rgn rgr rgt rma rmc rme rmg rmm rmn rmr rmt rna rnc rng rnm rnn rnr rnt rra rrc rrg rrm rrn rrr rrt rta rtc rte rtg rtm rtn rtr rtt taa tac tae tag tam tan tar tat tca tcc tce tcg tcm tcn tcr tct te- tea tec tee teg tem ten ter tet tga tgc tge tgg tgm tgn tgr tgt tma tmc tme tmg tmm tmn tmr tmt tna tnc tne tng tnm tnn tnr tnt tra trc tre trg trm trn trr trt tta ttc tte ttg ttm ttn ttr ttt