k-t kkk kkr kks kkt kky kok koo kor kos kot koy krk kro krr krs krt kry ksk kso ksr kss kst ktk kto ktr kts ktt kyo kyr kys kyt okk oko okr oks oo- ook ooo oor oos oot or- ork oro orr ors ort ory os- osk oso osr oss ost ot- otk oto otr ots ott oyo oys rkk rko rks rkt rky rok roo ror ros rot roy rrk rrr rrs rrt rsk rso rsr rss rst rtk rto rtr rts rtt rty ry- ryk ryo ryr rys ryy sk- skk sko skr sks skt sky sok soo sor sos sot soy sr- srk sro srr srs srt sry ss- ssk sso ssr sss sst stk sto str sts stt sty sy- syk syr sys syt tkk tko tkr tks tkt tky to- tok too tor tos tot toy trk tro trr trs trt try tsk tso tsr tss tst tsy ttk tto ttr tts ttt tty tyo tyr tys tyt ykk yok yoo yor yos yot yoy yro yrs yrt ysk yso ysr yss yst ysy ytk yto ytr yts ytt yys yyt yyy