c-- ccc cck ccn ccr ccs ccu ckc cks cn- cnc cnn cnr cns cnu crc crk crn crr crs cru csc csk csn csr css csu cuc cuk cun cur cus cuu kcc kck kcn kcr kcs kcu kkc kkk kkn kkr kks kku kn- knc knk knn knr knu krc krk krn krr krs kru ksc ksk ksn ksr kss ksu kuc kuk kun kur kus kuu ncc nck ncn ncr ncs ncu nkc nkk nkn nkr nks nku nnc nnk nnn nns nnu nrc nrk nrn nrr nrs nru nsc nsk nsn nsr nss nsu nuc nuk nun nur nus nuu rcc rcn rcr rcs rcu rkc rkk rks rku rnc rnn rnr rns rnu rrc rrk rrn rrr rrs rru rsc rsk rsn rsr rss rsu ruc ruk run rur rus ruu scc sck scn scr scs scu sk- skc skk skr sks sku snc snk snn snr sns snu sr- src srk srn srr srs ss- ssc ssk ssn ssr sss ssu suc suk sun sur sus suu ucc uck ucn ucr ucs ucu ukc ukk ukn ukr uku un- unc unk unn unr uns unu ur- urc urk urn urr urs uru usc usk usn usr uss usu uuc uun uur uus uuu