-up nnn nno nnp nns nnu no- non noo nop nor nos nou npn npo npp npr nps npu nrn nro nrp nrr nrs nru nsn nso nsp nsr nss nsu nun nuo nup nur nus nuu on- onn ono onp onr ons onu oo- oon ooo oop oor oos op- opn opo opp opr ops or- orn oro orp orr ors oru os- osn oso osp osr oss osu ou- oun ouo oup our ous p-p pn- pnn pno pnp pnr pns pnu pon poo pop por pos pou ppn ppo ppp ppr pps ppu prn pro prp prr prs pru ps- psn pso psp psr pss psu pun pup pur pus puu rnn rno rnp rnr rns rnu ron roo rop ror ros rou rpn rpo rpp rpr rps rpu rrn rrp rrr rrs rru rsn rso rsp rsr rss rsu run ruo rup rur rus ruu snn sno snp snr sns snu son soo sop sor sos sou spn spo spp spr sps spu sr- srn sro srp srr srs ss- ssn sso ssp ssr sss ssu sun suo sup sur sus suu un- unn uno unp unr uns unu uon uoo uop uor uos up- upn upo upp upr ups upu ur- urn uro urp urr urs uru usn uso usp usr uss usu uun uur uus uuu