c-- ccc cck ccn ccs ccu ckc cks cn- cnc cnn cns cnu csc csk csn css csu cuc cuk cun cus cuu kcc kck kcn kcs kcu kkc kkk kkn kks kku kn- knc knk knn knu ksc ksk ksn kss ksu kuc kuk kun kus kuu ncc nck ncn ncs ncu nkc nkk nkn nks nku nnc nnk nnn nns nnu nsc nsk nsn nss nsu nuc nuk nun nus nuu scc sck scn scs scu sk- skc skk sks sku snc snk snn sns snu ss- ssc ssk ssn sss ssu suc suk sun sus suu ucc uck ucn ucs ucu ukc ukk ukn uku un- unc unk unn uns unu usc usk usn uss usu uuc uun uus uuu