i-no iiii iiio iiis iino iioi iioo iiop iios iirs iisi iisp iisr inis inni inno innr inns ino- inoi inon inor inos inp- inpi inpp inri inro inrs inso insp inss invs ioii ioio ioni ionn iono ions iooi iooo ioos iops iori iors ioso ipin ipop ipos ippo ippr ipri ipsi ipso ipsp ipss ipvs iri- irin irio irip iris iron irop irov irps irri irrs irsp irvs isin isis isno iso- ison isop isor isos ispr isps isri isrp issi isso issp issr isss ivin ivon ivor ivrs n-ii niip niir nini nino nins nion nioo nios nipr nips niro nirs nirv nisi niso nisp niss nivo nivr nnnn nnos nnpi nnpr nnss noin noio noir nois non- noni nonn nono nons noo- noon nooo noop noor noos noov nops nor- nori norn noro norr nors norv nos- noss nov- novi novo npin npiv npov npri npss nron nrpn nrps nrsp nrsv nsin nsis nsnr nsos nspi nsps nsso nssp nssr nsss nvir nvis nvpi nvss oiii oins oion oios onir onis onni onno onon onor onos onso oons oooo ooos oops oosi opii opin opio opis opo- opon opor opos oppi oppo opps opsi ori- orin orio oris orni orno orns oro- oron oror oros orpi orps orri orro orrs orsi orso orvr orvs osii osin osip osis osno osnr osoi osoo osor osos osov osro ossi osso ovi- ovis ovni ovo- ovon ovoo ovpp piip pini pinn pino pinp pins pion pipi pipo pipp pips piri pirn piro pirr pirs pisi piso piss pivo pnin pnon pnpo pnpp pnro poin poio pois poni pono ponp pons poon poop poor poos pop- popi popo popp pops pori porn poro porr pors posi posn poso poss povo povs ppos pppn pppo pppp ppps ppss pri- prii prin pris priv prnp pro- pron proo prop pros prov prps prri prrs prsi prso prss prsv psip psis psni psnr psoi pson psos psov pspi pspp pspr psps psrp psso riin riis rinn rino rion rios ripi ripp ripr rips riri rirs risi riso risp riss rivo rivp rivs rnin rnpv rnsp roin roio roir rois roni rono rons rooi roon roop roor roos ropo rops rori roro rosi roso rosp ross rovi rovo rovs rpii rpon rpos rppn rpps rrrr rrsp rsis rsnn rsno rsnr rsos rspo rsps rsvp rvsp s-ii s-iv s-os sini sinn sino sinp sins sion siop sior sios sipi sipo sipp sips siri siro sirp sirr sirs sisi siss sivi snip snir snns snoo snop snor snos snov snpo snpp snrs snvi soin soir sois son- soni sono sons soon soop soor soos sopi sopo sopp sops sori sorn soro sorr sors sosi soso soss sosv sovo sovs spin spio spip spir spis spiv spns spon spoo spop spor spos spps spri spro sprs spso spsp spss sris srni srnn srno sros srps srsp srvn ssin ssis ssns ssop sspo ssps ssri ssrs sssi ssss ssvp svir svns svor viii vini vino vins vion vios vipr vips viri viro virr visi visn viso visp viss vivi vivo vnir vnso voin voio voip voir vois voni vonn vons voor vor- vori voro vors vosi voso voss vpon vpro vrin vrio vris vrnn vron vrpn vrsi vsip vsop vsrp vvvv