k-t kkk kkp kks kkt kpk kpp kps kpt ksk ksp kss kst ktk ktp kts ktt p-p pkp pks pkt ppk ppp pps ppt ppx ps- psk psp pss pst psx pt- ptk ptp pts ptt ptx pxk pxs pxt sk- skk skp sks skt skx spk spp sps spt spx ss- ssk ssp sss sst ssx stk stp sts stt stx sxs sxt t-x tkk tkp tks tkt tpk tpp tps tpt tpx tsk tsp tss tst tsx ttk ttp tts ttt ttx txk txs txt xks xpp xps xpt xsp xss xst xtp xts xtx xxp xxx