kkk kkn kkp kks kn- knk knn kno knp kok kon koo kop kos kpk kpn kpo kpp kps ksk ksn kso ksp kss nkk nkn nko nkp nks nnk nnn nno nnp nns no- nok non noo nop nos npn npo npp nps nsk nsn nso nsp nss okk oko okp oks on- onk onn ono onp ons oo- ook oon ooo oop oos op- opk opn opo opp ops os- osk osn oso osp oss p-p pkn pko pkp pks pn- pnk pnn pno pnp pns pok pon poo pop pos ppk ppn ppo ppp pps ps- psk psn pso psp pss sk- skk sko skp sks snk snn sno snp sns sok son soo sop sos spk spn spo spp sps ss- ssk ssn sso ssp sss