c-- ccc cck ccn ccr ccu ckc cn- cnc cnn cnr cnu crc crk crn crr cru cuc cuk cun cur cuu kcc kck kcn kcr kcu kkc kkk kkn kkr kku kn- knc knk knn knr knu krc krk krn krr kru kuc kuk kun kur kuu ncc nck ncn ncr ncu nkc nkk nkn nkr nku nnc nnk nnn nnu nrc nrk nrn nrr nru nuc nuk nun nur nuu rcc rcn rcr rcu rkc rkk rku rnc rnn rnr rnu rrc rrk rrn rrr rru ruc ruk run rur ruu ucc uck ucn ucr ucu ukc ukk ukn ukr uku un- unc unk unn unr unu ur- urc urk urn urr uru uuc uun uur uuu