kkk kkm kkr kks kkv kmk kmm kmo kms kok kom koo kor kos krk kro krr krs krv ksk ksm kso ksr kss ksv kvk kvm kvo kvr kvs kvv m-o m-r m-v mkk mkm mko mkr mks mkv mmk mmm mmo mmr mms mmv mok mom moo mor mos mov mrk mrm mro mrr mrs mrv msk msm mso msr mss msv mvm mvo mvr mvs mvv okk oko okr oks om- omm omo omr oms omv oo- ook oom ooo oor oos oov or- ork orm oro orr ors orv os- osk osm oso osr oss osv ov- ovo ovs ovv rkk rkm rko rks rkv rmm rmo rmr rms rmv rok rom roo ror ros rov rrk rrm rrr rrs rsk rsm rso rsr rss rsv rvm rvo rvr rvs rvv sk- skk skm sko skr sks smk smm smo smr sms smv sok som soo sor sos sov sr- srk srm sro srr srs srv ss- ssk ssm sso ssr sss ssv svk svm svo svr svs svv vkm vm- vmm vmo vmr vok vom voo vor vos vov vrk vrm vrr vrs vsk vsm vso vsr vss vsv vvm vvo vvr vvs vvv