c-- ccc ccf cck ccn ccu cfc cff cfk cfn cfu ckc cn- cnc cnf cnn cnu cuc cuf cuk cun cuu fcc fcf fck fcn fcu ffc fff ffk ffn ffu fkc fkf fkk fnc fnf fnk fnn fnu fuf fuk fun fuu kcc kck kcn kcu kfc kff kfu kkc kkk kkn kku kn- knc knf knk knn knu kuc kuk kun kuu ncc ncf nck ncn ncu nfc nff nfk nfn nfu nkc nkf nkk nkn nku nnc nnf nnk nnn nnu nuc nuk nun nuu ucc ucf uck ucn ucu ufc uff ufn ufu ukc ukf ukk ukn uku un- unc unf unk unn unu uuc uun uuu