kkk kkn kkr kks kkv kn- knk knn kno knr kok kon koo kor kos krk krn kro krr krs krv ksk ksn kso ksr kss ksv kvk kvn kvo kvr kvs kvv nkk nkn nko nkr nks nnk nnn nno nns nnv no- nok non noo nor nos nov nrk nrn nro nrr nrs nrv nsk nsn nso nsr nss nsv nvk nvn nvv okk oko okr oks on- onk onn ono onr ons oo- ook oon ooo oor oos oov or- ork orn oro orr ors orv os- osk osn oso osr oss osv ov- ovo ovs ovv rkk rko rks rkv rnn rno rnr rns rnv rok ron roo ror ros rov rrk rrn rrr rrs rsk rsn rso rsr rss rsv rvn rvo rvr rvs rvv sk- skk sko skr sks snk snn sno snr sns snv sok son soo sor sos sov sr- srk srn sro srr srs srv ss- ssk ssn sso ssr sss ssv svk svn svo svr svs svv vn- vno vnr vns vnv vok von voo vor vos vov vrk vrn vrr vrs vsk vsn vso vsr vss vsv vvo vvr vvs vvv