-er a-a a-c a-t aaa aac aae aaf aag aam aar aat ac- aca acc ace acf acg acm acr act aea aec aee aef aeg aem aer aet af- afa afc afe aff afg afm afr aft ag- aga agc age agf agg agm agr agt ama amc ame amf amg amm amr amt ar- ara arc are arf arg arm arr art at- ata atc ate atf atg atm atr att c-- caa cac cae caf cag cam car cat cca ccc cce ccf ccg ccm ccr cct ce- cea cec cee cef ceg cem cer cet cfa cfc cfe cff cfg cfm cfr cft cga cgc cge cgg cgm cgr cgt cma cmc cme cmf cmg cmm cmr cmt cra crc cre crf crg crm crr crt cta ctc cte ctf ctg ctm ctr ctt eaa eac eae eaf eag eam ear eat ec- eca ecc ece ecf ecg ecm ecr ect eea eec eee eef eeg eem eer eet ef- efa efc efe eff efg efm efr eft ega egc ege egf egg egm egr egt em- ema emc eme emf emg emm emr emt era erc ere erf erg erm err ert eta etc ete etf etg etm etr ett faa fac fae faf fag fam far fat fca fcc fce fcf fcg fcm fcr fct fea fec fee fef feg fem fer fet ffa ffc ffe fff ffg ffm ffr fft fga fgc fge fgf fgg fgm fgr fgt fma fmc fme fmf fmg fmm fmr fmt fra frc fre frf frg frm frr frt fta ftc fte ftf ftg ftm ftr ftt gaa gac gae gaf gag gam gar gat gca gcc gce gcf gcg gcm gcr gct ge- gea gec gee gef geg gem ger get gfa gfc gfe gff gfm gfr gft gga ggc ggg ggm ggr ggt gma gmc gme gmf gmg gmm gmr gmt gra grc gre grf grg grm grr grt gta gtc gte gtf gtg gtm gtr gtt m-f m-r maa mac mae maf mag mam mar mat mc- mca mcc mce mcf mcg mcm mcr mct mea mec mee mef meg mem mer met mfa mfc mfe mff mfg mfm mfr mft mga mgc mge mgf mgm mgr mgt mma mmc mme mmf mmg mmm mmr mmt mra mrc mre mrf mrg mrm mrr mrt mta mtc mte mtf mtg mtm mtr mtt ra- raa rac rae raf rag ram rar rat rca rcc rce rcf rcg rcm rcr rct re- rea rec ree ref reg rem rer ret rfa rfc rfe rff rfg rfm rfr rft rga rgc rge rgf rgg rgr rgt rma rmc rme rmf rmg rmm rmr rmt rra rrc rrf rrg rrm rrr rrt rta rtc rte rtf rtg rtm rtr rtt taa tac tae taf tag tam tar tat tca tcc tce tcf tcg tcm tcr tct te- tea tec tee tef teg tem ter tet tfa tfc tfe tff tfg tfm tfr tft tga tgc tge tgf tgg tgm tgr tgt tma tmc tme tmf tmg tmm tmr tmt tra trc tre trf trg trm trr trt tta ttc tte ttf ttg ttm ttr ttt