a-a a-c aaa aac aag aak aao aar aas aav ac- aca acc acg ack aco acr acs acv ag- aga agc agg agk ago agr ags agv aka akc akg akk ako akr aks akv aoa aoc aog aok aoo aor aos aov ar- ara arc arg ark aro arr ars arv as- asa asc asg ask aso asr ass asv av- ava avc avg avk avo avr avs c-- caa cac cag cak cao car cas cav cca ccc ccg cck cco ccr ccs ccv cga cgc cgg cgo cgr cgs cgv cka ckc cko cks co- coa coc cog cok coo cor cos cov cra crc crg crk cro crr crs crv csa csc csg csk cso csr css csv cva cvc cvg cvk cvo cvr cvs cvv gaa gac gag gak gao gar gas gav gca gcc gcg gck gco gcr gcs gga ggc ggg ggo ggr ggs ggv gka gko gks goa goc gog gok goo gor gos gov gra grc grg grk gro grr grs grv gsa gsc gsg gsk gso gsr gss gsv gva gvc gvg gvk gvo gvr gvs ka- kaa kac kag kak kao kar kas kav kca kcc kcg kck kcr kcs kga kgc kgo kgs kgv kkc kkk kkr kks kkv koa koc kog kok koo kor kos kra krc krg krk kro krr krs krv ksa ksc ksg ksk kso ksr kss ksv kva kvk kvo kvr kvs kvv oaa oac oag oak oao oar oas oav oc- oca occ ocg ock oco ocr ocs ocv oga ogc ogg ogo ogs oka okc okg okk oko okr oks oo- ooa ooc oog ook ooo oor oos oov or- ora orc org ork oro orr ors orv os- osa osc osg osk oso osr oss osv ov- ova ovc ovo ovs ovv ra- raa rac rag rak rao rar ras rav rca rcc rcg rco rcr rcs rcv rga rgc rgg rgk rgo rgr rgs rgv rkc rkg rkk rko rks rkv roa roc rog rok roo ror ros rov rra rrc rrg rrk rrr rrs rsa rsc rsg rsk rso rsr rss rsv rva rvc rvg rvo rvr rvs rvv saa sac sag sak sao sar sas sav sca scc scg sck sco scr scs scv sga sgc sgg sgk sgo sgr sgs sgv sk- ska skc skg skk sko skr sks soa soc sog sok soo sor sos sov sr- sra src srg srk sro srr srs srv ss- ssa ssc ssg ssk sso ssr sss ssv sva svc svg svk svo svr svs svv v-a vaa vac vag vak vao var vas vav vca vcc vco vcr vcs vga vgc vgg vgo vgr vgs vka vkg voa voc vog vok voo vor vos vov vra vrc vrg vrk vrr vrs vsa vsc vsg vsk vso vsr vss vsv vva vvc vvg vvo vvr vvs vvv