-ous iiii iiio iiis iioi iioo iiop iios iirs iisi iisp iisr iisu ioii ioio iooi iooo ioos iops iori iors ioso iosu ious ipop ipos ippo ippr ipri ipsi ipso ipsp ipss ipur ipus iri- irio irip iris irop irps irri irrs irsp irus isis iso- isop isor isos ispr isps isri isrp issi isso issp issr isss issu isup isus iuiu iupp iuss oiii oios oisu oooo ooos oops oosi oous opii opio opis opo- opor opos oppi oppo opps opsi opsu opus ori- orio oris oro- oror oros orpi orps orri orro orrs orsi orso orsu orup orus osii osip osis osoi osoo osor osos osro ossi osso ossu ouii ouir ouis our- ouro ours ouu- piip pipi pipo pipp pips piri piro pirr pirs piru pisi piso piss pisu pius poio pois poop poor poos pop- popi popo popp pops pori poro porr pors posi poso poss poui poup pour pous ppos pppo pppp ppps ppru ppss ppur pri- prii pris pro- proo prop pros prou prps prri prrs prsi prso prss prus pruu psip psis psoi psos psou pspi pspp pspr psps psrp psso puir puis puiu pupi pups pupu pur- puri puro purp purr purs puru pusi puss riis rios riou ripi ripp ripr rips riri rirs risi riso risp riss risu rius roio roir rois roiu rooi roop roor roos ropo rops rori roro roru rosi roso rosp ross roup rous rpii rpos rpps rrrr rrsp rsis rsos rspo rsps ruis rupp ruri ruro rurp rurs ruru rusi ruso russ rusu s-ii s-os siop sior sios siou sipi sipo sipp sips siri siro sirp sirr sirs siru sisi siss sisu siui sius soir sois soop soor soos sopi sopo sopp sops sopu sori soro sorr sors soru sosi soso soss soup sour sous spio spip spir spis spoo spop spor spos spps spri spro sprs spso spsp spss spui spur spus sris sros srps srsp ssis ssop sspo ssps ssri ssrs sssi ssss suio suir suis suor suos sup- supo supp supr sups sur- suri suro surp surr surs suru sus- susi suso susp suss susu suus u-rp uipi uirr uor- upis upor upos uppp uppu upri upsi upup uris uriu uro- uroo urpo urri ursi urso urss ursu urup urur urus usip usis usoi usos uspo uspp usps ussr usss ussu usui usus uuri uusi uuuu