c-- ccc cck ccm ccs ccu ckc ckm cks cmc cmk cmm cms cmu csc csk csm css csu cuc cuk cum cus cuu kcc kck kcm kcs kcu kkc kkk kkm kks kku kmc kmk kmm kms kmu ksc ksk ksm kss ksu kuc kuk kum kus kuu mc- mcc mck mcm mcs mcu mkc mkk mkm mks mku mmc mmk mmm mms mmu msc msk msm mss msu muc muk mum mus muu scc sck scm scs scu sk- skc skk skm sks sku smc smk smm sms smu ss- ssc ssk ssm sss ssu suc suk sum sus suu ucc uck ucm ucs ucu ukc ukk uku um- umc umm ums umu usc usk usm uss usu uuc uum uus uuu