iiii iiio iiis iioi iioo iiop iios iirs iisi iisp iisr ioii ioio iooi iooo ioos iops iori iors ioso ipop ipos ippo ippr ippy ipri ipsi ipso ipsp ipss iri- irio irip iris iriy irop irps irri irrs irsp isis iso- isop isor isos ispr isps ispy isri isrp issi isso issp issr isss issy isys iyos oiii oios oiry oooo ooos oops oory oosi opii opio opis opo- opor opos oppi oppo opps oppy opry opsi opsy ori- orio oris oro- oror oros oroy orpi orps orri orro orrs orry orsi orso orsy orys osii osip osis osoi osoo osor osos osro ossi osso ossy osyp oyri oyss piip pipi pipo pipp pips pipy piri piro pirr pirs piry pisi piso piss pisy piyo piys poio pois poop poor poos pop- popi popo popp pops popy pori poro porr pors pory posi poso poss posy poyo poyr poys ppos pppo pppp ppps ppss pri- prii pris pro- proo prop pros prps prri prrs prsi prso prss prys psip psis psoi psos pspi pspp pspr psps psrp psso psy- psys pyo- pyos pypy pyr- pyri pyro pyry pyss riis rios ripi ripp ripr rips riri rirs risi riso risp riss riyo roio roir rois rooi roop roor roos ropo rops ropy rori roro rory rosi roso rosp ross rosy roys rpii rpos rpps rrrr rrsp rsis rsos rspo rsps ryip ryis rysy s-ii s-os siop sior sios sipi sipo sipp sips sipy siri siro sirp sirr sirs sisi siss sisy siyi soir sois soop soor soos sooy sopi sopo sopp sops sopy sori soro sorr sors sory sosi soso soss soyo soys spio spip spir spis spoo spop spor spos spoy spps spri spro sprs spry spso spsp spss spy- spyr spys sris sros srps srsp ssis ssop sspo ssps ssri ssrs sssi ssss syis sypo syro syrs syry syso syss yips yirr yiss yoop yopo yopy yori yoro yory yosi yoso yoyo ypir ypsi ysii ysop yspi yyyy