c-- ccc ccm ccr ccs ccu cmc cmm cmr cms cmu crc crm crr crs cru csc csm csr css csu cuc cum cur cus cuu m-r mc- mcc mcm mcr mcs mcu mmc mmm mmr mms mmu mrc mrm mrr mrs mru msc msm msr mss msu muc mum mur mus muu rcc rcm rcr rcs rcu rmc rmm rmr rms rrc rrm rrr rrs rru rsc rsm rsr rss rsu ruc rum rur rus ruu scc scm scr scs scu smc smm smr sms smu sr- src srm srr srs ss- ssc ssm ssr sss ssu suc sum sur sus suu ucc ucm ucr ucs ucu um- umc umm umr ums umu ur- urc urm urr urs uru usc usm usr uss usu uuc uum uur uus uuu