-up kkk kkp kks kku kok koo kop kos kou kpk kpo kpp kps kpu ksk kso ksp kss ksu kuk kup kus kuu okk oko okp oks oku oo- ook ooo oop oos op- opk opo opp ops os- osk oso osp oss osu ou- ouk ouo oup ous p-p pko pkp pks pku pok poo pop pos pou ppk ppo ppp pps ppu ps- psk pso psp pss psu puk pup pus puu sk- skk sko skp sks sku sok soo sop sos sou spk spo spp sps spu ss- ssk sso ssp sss ssu suk suo sup sus suu ukk ukp uku uok uoo uop uos up- upk upo upp ups upu usk uso usp uss usu uus uuu