-up nnn nno nnp nns nnu no- non noo nop nos nou npn npo npp nps npu nsn nso nsp nss nsu nun nuo nup nus nuu on- onn ono onp ons onu oo- oon ooo oop oos op- opn opo opp ops os- osn oso osp oss osu ou- oun ouo oup ous p-p pn- pnn pno pnp pns pnu pon poo pop pos pou ppn ppo ppp pps ppu ps- psn pso psp pss psu pun pup pus puu snn sno snp sns snu son soo sop sos sou spn spo spp sps spu ss- ssn sso ssp sss ssu sun suo sup sus suu un- unn uno unp uns unu uon uoo uop uos up- upn upo upp ups upu usn uso usp uss usu uun uus uuu