-al -er a-a a-c a-t aaa aac aae aag aal aan aar aas aat ac- aca acc ace acg acl acn acr acs act aea aec aee aeg ael aen aer aes aet ag- aga agc age agg agl agn agr ags agt al- ala alc ale alg all aln alr als alt an- ana anc ane ang anl ann anr ans ant ar- ara arc are arg arl arn arr ars art as- asa asc ase asg asl asn asr ass ast at- ata atc ate atg atl atn atr ats att c-- caa cac cae cag cal can car cas cat cca ccc cce ccg ccl ccn ccr ccs cct ce- cea cec cee ceg cel cen cer ces cet cga cgc cge cgg cgl cgn cgr cgs cgt cl- cla clc cle clg cll cln clr cls clt cn- cna cnc cne cng cnl cnn cnr cns cnt cra crc cre crg crl crn crr crs crt csa csc cse csg csl csn csr css cst cta ctc cte ctg ctl ctn ctr cts ctt eaa eac eae eag eal ean ear eas eat ec- eca ecc ece ecg ecl ecn ecr ecs ect eea eec eee eeg eel een eer ees eet ega egc ege egg egl egn egr egs egt ela elc ele elg ell eln elr els elt en- ena enc ene eng enl enn enr ens ent era erc ere erg erl ern err ers ert es- esa esc ese esg esl esn esr ess est eta etc ete etg etl etn etr ets ett gaa gac gae gag gal gan gar gas gat gca gcc gce gcg gcl gcn gcr gcs gct ge- gea gec gee geg gel gen ger ges get gga ggc ggg ggn ggr ggs ggt gla glc gle glg gll gln glr gls glt gna gnc gne gnl gnn gnr gns gnt gra grc gre grg grl grn grr grs grt gsa gsc gse gsg gsl gsn gsr gss gst gta gtc gte gtg gtl gtn gtr gts gtt la- laa lac lae lag lal lan lar las lat lca lcc lce lcg lcl lcn lcr lcs lct lea lec lee leg lel len ler les let lga lgc lge lgg lgl lgn lgr lgs lgt lla llc lle llg lll lln llr lls llt lna lnc lne lng lnl lnn lnr lns lnt lra lrc lrg lrn lrr lrs lrt lsa lsc lse lsg lsl lsn lsr lss lst lta ltc lte ltg ltl ltr lts ltt naa nac nae nag nal nan nar nas nat nca ncc nce ncg ncl ncn ncr ncs nct ne- nea nec nee neg nel nen ner nes net nga ngc nge ngg ngl ngn ngs ngt nla nlc nle nlg nll nln nlr nls nlt nna nnc nne nng nnl nnn nns nnt nra nrc nre nrg nrl nrn nrr nrs nrt nsa nsc nse nsg nsl nsn nsr nss nst nta ntc nte ntg ntn ntr nts ntt ra- raa rac rae rag ral ran rar ras rat rca rcc rce rcg rcl rcn rcr rcs rct re- rea rec ree reg rel ren rer res ret rga rgc rge rgg rgn rgr rgs rgt rla rlc rle rlg rll rln rlr rls rlt rna rnc rng rnn rnr rns rnt rra rrc rrg rrl rrn rrr rrs rrt rsa rsc rse rsg rsl rsn rsr rss rst rta rtc rte rtg rtl rtn rtr rts rtt saa sac sae sag sal san sar sas sat sca scc sce scg scl scn scr scs sct se- sea sec see seg sel sen ser ses set sga sgc sge sgg sgl sgn sgr sgs sgt sla slc sle slg sll sln slr sls slt sna snc sne sng snl snn snr sns snt sr- sra src sre srg srl srn srr srs srt ss- ssa ssc sse ssg ssl ssn ssr sss sst sta stc ste stg stl stn str sts stt taa tac tae tag tal tan tar tas tat tca tcc tce tcg tcl tcn tcr tcs tct te- tea tec tee teg tel ten ter tes tet tga tgc tge tgg tgl tgn tgr tgs tgt tla tlc tle tlg tll tln tlr tls tlt tna tnc tne tng tnl tnn tnr tns tnt tra trc tre trg trl trn trr trs trt tsa tsc tse tsg tsl tsn tsr tss tst tta ttc tte ttg ttl ttn ttr tts ttt