-er -ic a-a a-c a-i a-t aaa aac aae aag aai aan aar aas aat ac- aca acc ace acg aci acn acr acs act aea aec aee aeg aei aen aer aes aet ag- aga agc age agg agi agn agr ags agt ai- aia aic aie aig aii ain air ais ait an- ana anc ane ang ani ann anr ans ant ar- ara arc are arg ari arn arr ars art as- asa asc ase asg asi asn asr ass ast at- ata atc ate atg ati atn atr ats att c-- caa cac cae cag cai can car cas cat cca ccc cce ccg cci ccn ccr ccs cct ce- cea cec cee ceg cei cen cer ces cet cga cgc cge cgg cgi cgn cgr cgs cgt ci- cia cic cie cig cii cin cir cis cit cn- cna cnc cne cng cni cnn cnr cns cnt cra crc cre crg cri crn crr crs crt csa csc cse csg csi csn csr css cst cta ctc cte ctg cti ctn ctr cts ctt eaa eac eae eag eai ean ear eas eat ec- eca ecc ece ecg eci ecn ecr ecs ect eea eec eee eeg een eer ees eet ega egc ege egg egi egn egr egs egt eia eic eie eig eii ein eir eis eit en- ena enc ene eng eni enn enr ens ent era erc ere erg eri ern err ers ert es- esa esc ese esg esi esn esr ess est eta etc ete etg eti etn etr ets ett gaa gac gae gag gai gan gar gas gat gca gcc gce gcg gci gcn gcr gcs gct ge- gea gec gee geg gei gen ger ges get gga ggc ggg ggi ggn ggr ggs ggt gia gic gie gig gii gin gir gis git gna gnc gne gni gnn gnr gns gnt gra grc gre grg gri grn grr grs grt gsa gsc gse gsg gsi gsn gsr gss gst gta gtc gte gtg gti gtn gtr gts gtt ia- iaa iac iae iag iai ian iar ias iat ica icc ice icg ici icn icr ics ict ie- iea iec iee ieg iei ien ier ies iet iga igc ige igg igi ign igr igs igt iia iic iie iii iin iir iis iit in- ina inc ine ing ini inn inr ins int ir- ira irc ire irg iri irn irr irs irt is- isa isc ise isg isi isn isr iss ist ita itc ite itg iti itn its itt n-i naa nac nae nag nai nan nar nas nat nca ncc nce ncg nci ncn ncr ncs nct ne- nea nec nee neg nei nen ner nes net nga ngc nge ngg ngi ngn ngs ngt nia nic nie nig nii nin nir nis nit nna nnc nne nng nni nnn nns nnt nra nrc nre nrg nri nrn nrr nrs nrt nsa nsc nse nsg nsi nsn nsr nss nst nta ntc nte ntg nti ntn ntr nts ntt ra- raa rac rae rag rai ran rar ras rat rca rcc rce rcg rci rcn rcr rcs rct re- rea rec ree reg rei ren rer res ret rga rgc rge rgg rgi rgn rgr rgs rgt ria ric rie rig rii rin rir ris rit rna rnc rng rni rnn rnr rns rnt rra rrc rrg rri rrn rrr rrs rrt rsa rsc rse rsg rsi rsn rsr rss rst rta rtc rte rtg rti rtn rtr rts rtt saa sac sae sag sai san sar sas sat sca scc sce scg sci scn scr scs sct se- sea sec see seg sei sen ser ses set sga sgc sge sgg sgi sgn sgr sgs sgt sia sic sie sig sii sin sir sis sit sna snc sne sng sni snn snr sns snt sr- sra src sre srg sri srn srr srs srt ss- ssa ssc sse ssg ssi ssn ssr sss sst sta stc ste stg sti stn str sts stt taa tac tae tag tai tan tar tas tat tca tcc tce tcg tci tcn tcr tcs tct te- tea tec tee teg tei ten ter tes tet tga tgc tge tgg tgi tgn tgr tgs tgt tia tic tie tig tii tin tir tis tit tna tnc tne tng tni tnn tnr tns tnt tra trc tre trg tri trn trr trs trt tsa tsc tse tsg tsi tsn tsr tss tst tta ttc tte ttg tti ttn ttr tts ttt