-up k-t kkk kkp kks kkt kku kok koo kop kos kot kou kpk kpo kpp kps kpt kpu ksk kso ksp kss kst ksu ktk kto ktp kts ktt ktu kuk kup kus kut kuu okk oko okp oks oku oo- ook ooo oop oos oot op- opk opo opp ops opt os- osk oso osp oss ost osu ot- otk oto otp ots ott otu ou- ouk ouo oup ous out p-p pko pkp pks pkt pku pok poo pop pos pot pou ppk ppo ppp pps ppt ppu ps- psk pso psp pss pst psu pt- ptk pto ptp pts ptt ptu puk pup pus put puu sk- skk sko skp sks skt sku sok soo sop sos sot sou spk spo spp sps spt spu ss- ssk sso ssp sss sst ssu stk sto stp sts stt stu suk suo sup sus sut suu tkk tko tkp tks tkt to- tok too top tos tot tou tpk tpo tpp tps tpt tpu tsk tso tsp tss tst tsu ttk tto ttp tts ttt ttu tuk tuo tup tus tut tuu ukk ukp uku uok uoo uop uos uot up- upk upo upp ups upt upu usk uso usp uss ust usu utk uto utp uts utt utu uus uut uuu