c-- ccc cck ccn ccs cct ccu ckc cks ckt cn- cnc cnn cns cnt cnu csc csk csn css cst csu ctc ctk ctn cts ctt ctu cuc cuk cun cus cut cuu k-t kcc kck kcn kcs kct kcu kkc kkk kkn kks kkt kku kn- knc knk knn knt knu ksc ksk ksn kss kst ksu ktc ktk ktn kts ktt ktu kuc kuk kun kus kut kuu ncc nck ncn ncs nct ncu nkc nkk nkn nks nkt nku nnc nnk nnn nns nnt nnu nsc nsk nsn nss nst nsu ntc ntk ntn nts ntt ntu nuc nuk nun nus nut nuu scc sck scn scs sct scu sk- skc skk sks skt sku snc snk snn sns snt snu ss- ssc ssk ssn sss sst ssu stc stk stn sts stt stu suc suk sun sus sut suu tcc tck tcn tcs tct tcu tkc tkk tks tkt tnc tnk tnn tns tnt tsc tsk tsn tss tst tsu ttc ttk ttn tts ttt ttu tuc tuk tun tus tut tuu ucc uck ucn ucs uct ucu ukc ukk ukn uku un- unc unk unn uns unt unu usc usk usn uss ust usu utc utk utn uts utt utu uuc uun uus uut uuu