c-- ccc cck cco ccr ccs cct ckc cko cks ckt cky co- coc cok coo cor cos cot coy crc crk cro crr crs crt cry csc csk cso csr css cst csy ctc ctk cto ctr cts ctt cty cyc cyk cyo cyr cys cyt k-t kcc kck kcr kcs kct kkc kkk kkr kks kkt kky koc kok koo kor kos kot koy krc krk kro krr krs krt kry ksc ksk kso ksr kss kst ktc ktk kto ktr kts ktt kyc kyo kyr kys kyt oc- occ ock oco ocr ocs oct okc okk oko okr oks oo- ooc ook ooo oor oos oot or- orc ork oro orr ors ort ory os- osc osk oso osr oss ost ot- otc otk oto otr ots ott oyo oys rcc rco rcr rcs rct rkc rkk rko rks rkt rky roc rok roo ror ros rot roy rrc rrk rrr rrs rrt rsc rsk rso rsr rss rst rtc rtk rto rtr rts rtt rty ry- ryc ryk ryo ryr rys ryy scc sck sco scr scs sct sk- skc skk sko skr sks skt sky soc sok soo sor sos sot soy sr- src srk sro srr srs srt sry ss- ssc ssk sso ssr sss sst stc stk sto str sts stt sty sy- syc syk syr sys syt tcc tck tco tcr tcs tct tkc tkk tko tkr tks tkt tky to- toc tok too tor tos tot toy trc trk tro trr trs trt try tsc tsk tso tsr tss tst tsy ttc ttk tto ttr tts ttt tty tyc tyo tyr tys tyt ycc yco ycs ycy ykk yoc yok yoo yor yos yot yoy yrc yro yrs yrt ysc ysk yso ysr yss yst ysy ytc ytk yto ytr yts ytt yyc yys yyt yyy