kkk kkm kkr kks kku kmk kmm kmo kms kmu kok kom koo kor kos kou krk kro krr krs kru ksk ksm kso ksr kss ksu kuk kum kur kus kuu m-o m-r mkk mkm mko mkr mks mku mmk mmm mmo mmr mms mmu mok mom moo mor mos mou mrk mrm mro mrr mrs mru msk msm mso msr mss msu muk mum mur mus muu okk oko okr oks oku om- omm omo omr oms omu oo- ook oom ooo oor oos or- ork orm oro orr ors oru os- osk osm oso osr oss osu ou- ouk oum ouo our ous rkk rkm rko rks rku rmm rmo rmr rms rok rom roo ror ros rou rrk rrm rrr rrs rru rsk rsm rso rsr rss rsu ruk rum ruo rur rus ruu sk- skk skm sko skr sks sku smk smm smo smr sms smu sok som soo sor sos sou sr- srk srm sro srr srs ss- ssk ssm sso ssr sss ssu suk sum suo sur sus suu ukk ukr uku um- umm umo umr ums umu uok uom uoo uor uos ur- urk urm uro urr urs uru usk usm uso usr uss usu uum uur uus uuu