c-- ccc cck ccs cct ccu ckc cks ckt cky csc csk css cst csu csy ctc ctk cts ctt ctu cty cuc cuk cus cut cuu cuy cyc cyk cys cyt k-t kcc kck kcs kct kcu kkc kkk kks kkt kku kky ksc ksk kss kst ksu ktc ktk kts ktt ktu kuc kuk kus kut kuu kuy kyc kys kyt kyu scc sck scs sct scu sk- skc skk sks skt sku sky ss- ssc ssk sss sst ssu stc stk sts stt stu sty suc suk sus sut suu suy sy- syc syk sys syt syu tcc tck tcs tct tcu tkc tkk tks tkt tky tsc tsk tss tst tsu tsy ttc ttk tts ttt ttu tty tuc tuk tus tut tuu tuy tyc tys tyt ucc uck ucs uct ucu ukc ukk uku usc usk uss ust usu utc utk uts utt utu uty uuc uus uut uuu uyc uys uyu ycc ycs ycu ycy ykk ysc ysk yss yst ysu ysy ytc ytk yts ytt ytu yuk yus yut yuu yuy yyc yys yyt yyu yyy