a-a a-c aaa aac aag aao aar aas aav ac- aca acc acg aco acr acs acv ag- aga agc agg ago agr ags agv aoa aoc aog aoo aor aos aov ar- ara arc arg aro arr ars arv as- asa asc asg aso asr ass asv av- ava avc avg avo avr avs c-- caa cac cag cao car cas cav cca ccc ccg cco ccr ccs ccv cga cgc cgg cgo cgr cgs cgv co- coa coc cog coo cor cos cov cra crc crg cro crr crs crv csa csc csg cso csr css csv cva cvc cvg cvo cvr cvs cvv gaa gac gag gao gar gas gav gca gcc gcg gco gcr gcs gga ggc ggg ggo ggr ggs ggv goa goc gog goo gor gos gov gra grc grg gro grr grs grv gsa gsc gsg gso gsr gss gsv gva gvc gvg gvo gvr gvs oaa oac oag oao oar oas oav oc- oca occ ocg oco ocr ocs ocv oga ogc ogg ogo ogs oo- ooa ooc oog ooo oor oos oov or- ora orc org oro orr ors orv os- osa osc osg oso osr oss osv ov- ova ovc ovo ovs ovv ra- raa rac rag rao rar ras rav rca rcc rcg rco rcr rcs rcv rga rgc rgg rgo rgr rgs rgv roa roc rog roo ror ros rov rra rrc rrg rrr rrs rsa rsc rsg rso rsr rss rsv rva rvc rvg rvo rvr rvs rvv saa sac sag sao sar sas sav sca scc scg sco scr scs scv sga sgc sgg sgo sgr sgs sgv soa soc sog soo sor sos sov sr- sra src srg sro srr srs srv ss- ssa ssc ssg sso ssr sss ssv sva svc svg svo svr svs svv v-a vaa vac vag vao var vas vav vca vcc vco vcr vcs vga vgc vgg vgo vgr vgs voa voc vog voo vor vos vov vra vrc vrg vrr vrs vsa vsc vsg vso vsr vss vsv vva vvc vvg vvo vvr vvs vvv