c-- ccc ccm cco ccr ccu cmc cmm cmo cmr cmu co- coc com coo cor cou crc crm cro crr cru cuc cum cuo cur cuu m-o m-r mc- mcc mcm mco mcr mcu mmc mmm mmo mmr mmu moc mom moo mor mou mrc mrm mro mrr mru muc mum mur muu oc- occ ocm oco ocr ocu om- omc omm omo omr omu oo- ooc oom ooo oor or- orc orm oro orr oru ou- ouc oum ouo our rcc rcm rco rcr rcu rmc rmm rmo rmr roc rom roo ror rou rrc rrm rrr rru ruc rum ruo rur ruu ucc ucm uco ucr ucu um- umc umm umo umr umu uoc uom uoo uor ur- urc urm uro urr uru uuc uum uur uuu