a-a a-c aaa aac aag aan aao aar aas ac- aca acc acg acn aco acr acs ag- aga agc agg agn ago agr ags an- ana anc ang ann ano anr ans aoa aoc aog aon aoo aor aos ar- ara arc arg arn aro arr ars as- asa asc asg asn aso asr ass c-- caa cac cag can cao car cas cca ccc ccg ccn cco ccr ccs cga cgc cgg cgn cgo cgr cgs cn- cna cnc cng cnn cno cnr cns co- coa coc cog con coo cor cos cra crc crg crn cro crr crs csa csc csg csn cso csr css gaa gac gag gan gao gar gas gca gcc gcg gcn gco gcr gcs gga ggc ggg ggn ggo ggr ggs gna gnc gnn gno gnr gns goa goc gog gon goo gor gos gra grc grg grn gro grr grs gsa gsc gsg gsn gso gsr gss naa nac nag nan nao nar nas nca ncc ncg ncn nco ncr ncs nga ngc ngg ngn ngo ngs nna nnc nng nnn nno nns no- noa noc nog non noo nor nos nra nrc nrg nrn nro nrr nrs nsa nsc nsg nsn nso nsr nss oaa oac oag oan oao oar oas oc- oca occ ocg ocn oco ocr ocs oga ogc ogg ogn ogo ogs on- ona onc ong onn ono onr ons oo- ooa ooc oog oon ooo oor oos or- ora orc org orn oro orr ors os- osa osc osg osn oso osr oss ra- raa rac rag ran rao rar ras rca rcc rcg rcn rco rcr rcs rga rgc rgg rgn rgo rgr rgs rna rnc rng rnn rno rnr rns roa roc rog ron roo ror ros rra rrc rrg rrn rrr rrs rsa rsc rsg rsn rso rsr rss saa sac sag san sao sar sas sca scc scg scn sco scr scs sga sgc sgg sgn sgo sgr sgs sna snc sng snn sno snr sns soa soc sog son soo sor sos sr- sra src srg srn sro srr srs ss- ssa ssc ssg ssn sso ssr sss