nnnn nnos nnpr nnss non- nonn nono nons noo- noon nooo noop noor noos noov nops nor- norn noro norr nors norv nos- noss nov- novo npov npss nron nrpn nrps nrsp nrsv nsnr nsos nsps nsso nssp nssr nsss nvss onno onon onor onos onso oons oooo ooos oops opo- opon opor opos oppo opps orno orns oro- oron oror oros orps orro orrs orso orvr orvs osno osnr osoo osor osos osov osro osso ovo- ovon ovoo ovpp pnon pnpo pnpp pnro pono ponp pons poon poop poor poos pop- popo popp pops porn poro porr pors posn poso poss povo povs ppos pppn pppo pppp ppps ppss prnp pro- pron proo prop pros prov prps prrs prso prss prsv psnr pson psos psov pspp pspr psps psrp psso rnpv rnsp rono rons roon roop roor roos ropo rops roro roso rosp ross rovo rovs rpon rpos rppn rpps rrrr rrsp rsnn rsno rsnr rsos rspo rsps rsvp rvsp s-os snns snoo snop snor snos snov snpo snpp snrs son- sono sons soon soop soor soos sopo sopp sops sorn soro sorr sors soso soss sosv sovo sovs spns spon spoo spop spor spos spps spro sprs spso spsp spss srnn srno sros srps srsp srvn ssns ssop sspo ssps ssrs ssss ssvp svns svor vnso vonn vons voor vor- voro vors voso voss vpon vpro vrnn vron vrpn vsop vsrp vvvv