k-t kkk kkp kkr kks kkt kok koo kop kor kos kot kpk kpo kpp kpr kps kpt krk kro krp krr krs krt ksk kso ksp ksr kss kst ktk kto ktp ktr kts ktt okk oko okp okr oks oo- ook ooo oop oor oos oot op- opk opo opp opr ops opt or- ork oro orp orr ors ort os- osk oso osp osr oss ost ot- otk oto otp otr ots ott p-p pko pkp pkr pks pkt pok poo pop por pos pot ppk ppo ppp ppr pps ppt prk pro prp prr prs prt ps- psk pso psp psr pss pst pt- ptk pto ptp ptr pts ptt rkk rko rkp rks rkt rok roo rop ror ros rot rpk rpo rpp rpr rps rpt rrk rrp rrr rrs rrt rsk rso rsp rsr rss rst rtk rto rtp rtr rts rtt sk- skk sko skp skr sks skt sok soo sop sor sos sot spk spo spp spr sps spt sr- srk sro srp srr srs srt ss- ssk sso ssp ssr sss sst stk sto stp str sts stt tkk tko tkp tkr tks tkt to- tok too top tor tos tot tpk tpo tpp tpr tps tpt trk tro trp trr trs trt tsk tso tsp tsr tss tst ttk tto ttp ttr tts ttt