c-- ccc cck cco ccs cct ccu ckc cko cks ckt cky co- coc cok coo cos cot cou coy csc csk cso css cst csu csy ctc ctk cto cts ctt ctu cty cuc cuk cuo cus cut cuu cuy cyc cyk cyo cys cyt k-t kcc kck kcs kct kcu kkc kkk kks kkt kku kky koc kok koo kos kot kou koy ksc ksk kso kss kst ksu ktc ktk kto kts ktt ktu kuc kuk kus kut kuu kuy kyc kyo kys kyt kyu oc- occ ock oco ocs oct ocu okc okk oko oks oku oo- ooc ook ooo oos oot os- osc osk oso oss ost osu ot- otc otk oto ots ott otu ou- ouc ouk ouo ous out oyo oys scc sck sco scs sct scu sk- skc skk sko sks skt sku sky soc sok soo sos sot sou soy ss- ssc ssk sso sss sst ssu stc stk sto sts stt stu sty suc suk suo sus sut suu suy sy- syc syk sys syt syu tcc tck tco tcs tct tcu tkc tkk tko tks tkt tky to- toc tok too tos tot tou toy tsc tsk tso tss tst tsu tsy ttc ttk tto tts ttt ttu tty tuc tuk tuo tus tut tuu tuy tyc tyo tys tyt ucc uck uco ucs uct ucu ukc ukk uku uoc uok uoo uos uot usc usk uso uss ust usu utc utk uto uts utt utu uty uuc uus uut uuu uyc uyo uys uyu ycc yco ycs ycu ycy ykk yoc yok yoo yos yot you yoy ysc ysk yso yss yst ysu ysy ytc ytk yto yts ytt ytu yuk yuo yus yut yuu yuy yyc yys yyt yyu yyy