c-- ccc ccm ccr ccu cmc cmm cmr cmu cmy crc crm crr cru cry cuc cum cur cuu cuy cyc cym cyr m-r mc- mcc mcm mcr mcu mmc mmm mmr mmu mrc mrm mrr mru mry muc mum mur muu muy my- myc mym myr myu rcc rcm rcr rcu rmc rmm rmr rrc rrm rrr rru ruc rum rur ruu ruy ry- ryc rym ryr ryu ryy ucc ucm ucr ucu um- umc umm umr umu ur- urc urm urr uru ury uuc uum uur uuu uyc uyu ycc ycu ycy ymc ymm yrc yru yum yur yuu yuy yyc yyu yyy