a-a a-c aaa aac aag aak aan aao aar aas ac- aca acc acg ack acn aco acr acs ag- aga agc agg agk agn ago agr ags aka akc akg akk akn ako akr aks an- ana anc ang ank ann ano anr ans aoa aoc aog aok aon aoo aor aos ar- ara arc arg ark arn aro arr ars as- asa asc asg ask asn aso asr ass c-- caa cac cag cak can cao car cas cca ccc ccg cck ccn cco ccr ccs cga cgc cgg cgn cgo cgr cgs cka ckc cko cks cn- cna cnc cng cnn cno cnr cns co- coa coc cog cok con coo cor cos cra crc crg crk crn cro crr crs csa csc csg csk csn cso csr css gaa gac gag gak gan gao gar gas gca gcc gcg gck gcn gco gcr gcs gga ggc ggg ggn ggo ggr ggs gka gkn gko gks gna gnc gnn gno gnr gns goa goc gog gok gon goo gor gos gra grc grg grk grn gro grr grs gsa gsc gsg gsk gsn gso gsr gss ka- kaa kac kag kak kan kao kar kas kca kcc kcg kck kcn kcr kcs kga kgc kgo kgs kkc kkk kkn kkr kks kn- kna knc kng knk knn kno knr koa koc kog kok kon koo kor kos kra krc krg krk krn kro krr krs ksa ksc ksg ksk ksn kso ksr kss naa nac nag nak nan nao nar nas nca ncc ncg nck ncn nco ncr ncs nga ngc ngg ngk ngn ngo ngs nka nkc nkk nkn nko nkr nks nna nnc nng nnk nnn nno nns no- noa noc nog nok non noo nor nos nra nrc nrg nrk nrn nro nrr nrs nsa nsc nsg nsk nsn nso nsr nss oaa oac oag oak oan oao oar oas oc- oca occ ocg ock ocn oco ocr ocs oga ogc ogg ogn ogo ogs oka okc okg okk oko okr oks on- ona onc ong onk onn ono onr ons oo- ooa ooc oog ook oon ooo oor oos or- ora orc org ork orn oro orr ors os- osa osc osg osk osn oso osr oss ra- raa rac rag rak ran rao rar ras rca rcc rcg rcn rco rcr rcs rga rgc rgg rgk rgn rgo rgr rgs rkc rkg rkk rko rks rna rnc rng rnn rno rnr rns roa roc rog rok ron roo ror ros rra rrc rrg rrk rrn rrr rrs rsa rsc rsg rsk rsn rso rsr rss saa sac sag sak san sao sar sas sca scc scg sck scn sco scr scs sga sgc sgg sgk sgn sgo sgr sgs sk- ska skc skg skk sko skr sks sna snc sng snk snn sno snr sns soa soc sog sok son soo sor sos sr- sra src srg srk srn sro srr srs ss- ssa ssc ssg ssk ssn sso ssr sss