a-a a-c a-t aaa aac aaf aag aan aao aar aas aat ac- aca acc acf acg acn aco acr acs act af- afa afc aff afg afn afo afr afs aft ag- aga agc agf agg agn ago agr ags agt an- ana anc anf ang ann ano anr ans ant aoa aoc aof aog aon aoo aor aos aot ar- ara arc arf arg arn aro arr ars art as- asa asc asf asg asn aso asr ass ast at- ata atc atf atg atn ato atr ats att c-- caa cac caf cag can cao car cas cat cca ccc ccf ccg ccn cco ccr ccs cct cfa cfc cff cfg cfn cfo cfr cfs cft cga cgc cgg cgn cgo cgr cgs cgt cn- cna cnc cnf cng cnn cno cnr cns cnt co- coa coc cof cog con coo cor cos cot cra crc crf crg crn cro crr crs crt csa csc csf csg csn cso csr css cst cta ctc ctf ctg ctn cto ctr cts ctt faa fac faf fag fan fao far fas fat fca fcc fcf fcg fcn fco fcr fcs fct ffa ffc fff ffg ffn ffo ffr ffs fft fga fgc fgf fgg fgn fgr fgs fgt fna fnc fnf fng fnn fnr fns fnt foa foc fof fog fon foo for fos fot fra frc frf frg frn fro frr frs frt fsa fsc fsf fsg fsn fso fsr fss fst fta ftc ftf ftg ftn fto ftr fts ftt gaa gac gaf gag gan gao gar gas gat gca gcc gcf gcg gcn gco gcr gcs gct gfa gfc gff gfo gfr gfs gft gga ggc ggg ggn ggo ggr ggs ggt gna gnc gnf gnn gno gnr gns gnt goa goc gof gog gon goo gor gos got gra grc grf grg grn gro grr grs grt gsa gsc gsf gsg gsn gso gsr gss gst gta gtc gtf gtg gtn gto gtr gts gtt naa nac naf nag nan nao nar nas nat nca ncc ncf ncg ncn nco ncr ncs nct nfa nfc nff nfn nfo nfr nfs nft nga ngc ngf ngg ngn ngo ngs ngt nna nnc nnf nng nnn nno nns nnt no- noa noc nof nog non noo nor nos not nra nrc nrf nrg nrn nro nrr nrs nrt nsa nsc nsf nsg nsn nso nsr nss nst nta ntc ntf ntg ntn nto ntr nts ntt oaa oac oaf oag oan oao oar oas oat oc- oca occ ocf ocg ocn oco ocr ocs oct of- ofa ofc off ofg ofn ofo ofr ofs oft oga ogc ogf ogg ogn ogo ogs ogt on- ona onc onf ong onn ono onr ons ont oo- ooa ooc oof oog oon ooo oor oos oot or- ora orc orf org orn oro orr ors ort os- osa osc osf osg osn oso osr oss ost ot- ota otc otf otg otn oto otr ots ott ra- raa rac raf rag ran rao rar ras rat rca rcc rcf rcg rcn rco rcr rcs rct rfa rfc rff rfg rfn rfo rfr rfs rft rga rgc rgf rgg rgn rgo rgr rgs rgt rna rnc rng rnn rno rnr rns rnt roa roc rof rog ron roo ror ros rot rra rrc rrf rrg rrn rrr rrs rrt rsa rsc rsf rsg rsn rso rsr rss rst rta rtc rtf rtg rtn rto rtr rts rtt saa sac saf sag san sao sar sas sat sca scc scf scg scn sco scr scs sct sfa sfc sff sfg sfn sfo sfr sfs sft sga sgc sgf sgg sgn sgo sgr sgs sgt sna snc snf sng snn sno snr sns snt soa soc sof sog son soo sor sos sot sr- sra src srf srg srn sro srr srs srt ss- ssa ssc ssf ssg ssn sso ssr sss sst sta stc stf stg stn sto str sts stt taa tac taf tag tan tao tar tas tat tca tcc tcf tcg tcn tco tcr tcs tct tfa tfc tff tfg tfn tfo tfr tfs tft tga tgc tgf tgg tgn tgo tgr tgs tgt tna tnc tnf tng tnn tno tnr tns tnt to- toa toc tof tog ton too tor tos tot tra trc trf trg trn tro trr trs trt tsa tsc tsf tsg tsn tso tsr tss tst tta ttc ttf ttg ttn tto ttr tts ttt