c-- ccc cck ccr cct ccu ckc ckt cky crc crk crr crt cru cry ctc ctk ctr ctt ctu cty cuc cuk cur cut cuu cuy cyc cyk cyr cyt k-t kcc kck kcr kct kcu kkc kkk kkr kkt kku kky krc krk krr krt kru kry ktc ktk ktr ktt ktu kuc kuk kur kut kuu kuy kyc kyr kyt kyu rcc rcr rct rcu rkc rkk rkt rku rky rrc rrk rrr rrt rru rtc rtk rtr rtt rtu rty ruc ruk rur rut ruu ruy ry- ryc ryk ryr ryu ryy tcc tck tcr tct tcu tkc tkk tkr tkt tky trc trk trr trt tru try ttc ttk ttr ttt ttu tty tuc tuk tur tut tuu tuy tyc tyr tyt ucc uck ucr uct ucu ukc ukk ukr uku ur- urc urk urr urt uru ury utc utk utr utt utu uty uuc uur uut uuu uyc uyu ycc ycu ycy ykk yrc yrt yru ytc ytk ytr ytt ytu yuk yur yut yuu yuy yyc yyt yyu yyy