c-- ccc cck ccm cco ccr ccu ckc ckm cko cmc cmk cmm cmo cmr cmu co- coc cok com coo cor cou crc crk crm cro crr cru cuc cuk cum cuo cur cuu kcc kck kcm kcr kcu kkc kkk kkm kkr kku kmc kmk kmm kmo kmu koc kok kom koo kor kou krc krk kro krr kru kuc kuk kum kur kuu m-o m-r mc- mcc mck mcm mco mcr mcu mkc mkk mkm mko mkr mku mmc mmk mmm mmo mmr mmu moc mok mom moo mor mou mrc mrk mrm mro mrr mru muc muk mum mur muu oc- occ ock ocm oco ocr ocu okc okk oko okr oku om- omc omm omo omr omu oo- ooc ook oom ooo oor or- orc ork orm oro orr oru ou- ouc ouk oum ouo our rcc rcm rco rcr rcu rkc rkk rkm rko rku rmc rmm rmo rmr roc rok rom roo ror rou rrc rrk rrm rrr rru ruc ruk rum ruo rur ruu ucc uck ucm uco ucr ucu ukc ukk ukr uku um- umc umm umo umr umu uoc uok uom uoo uor ur- urc urk urm uro urr uru uuc uum uur uuu