c-- ccc ccm cco ccr ccs ccu cmc cmm cmo cmr cms cmu co- coc com coo cor cos cou crc crm cro crr crs cru csc csm cso csr css csu cuc cum cuo cur cus cuu m-o m-r mc- mcc mcm mco mcr mcs mcu mmc mmm mmo mmr mms mmu moc mom moo mor mos mou mrc mrm mro mrr mrs mru msc msm mso msr mss msu muc mum mur mus muu oc- occ ocm oco ocr ocs ocu om- omc omm omo omr oms omu oo- ooc oom ooo oor oos or- orc orm oro orr ors oru os- osc osm oso osr oss osu ou- ouc oum ouo our ous rcc rcm rco rcr rcs rcu rmc rmm rmo rmr rms roc rom roo ror ros rou rrc rrm rrr rrs rru rsc rsm rso rsr rss rsu ruc rum ruo rur rus ruu scc scm sco scr scs scu smc smm smo smr sms smu soc som soo sor sos sou sr- src srm sro srr srs ss- ssc ssm sso ssr sss ssu suc sum suo sur sus suu ucc ucm uco ucr ucs ucu um- umc umm umo umr ums umu uoc uom uoo uor uos ur- urc urm uro urr urs uru usc usm uso usr uss usu uuc uum uur uus uuu