iiii iiio iiis iioi iioo iios iirs iisi iisr ioii ioio iooi iooo ioos iori iors ioso iri- irio iris iriy irri irrs isis iso- isor isos isri issi isso issr isss issy isys iyos oiii oios oiry oooo ooos oory oosi ori- orio oris oro- oror oros oroy orri orro orrs orry orsi orso orsy orys osii osis osoi osoo osor osos osro ossi osso ossy oyri oyss riis rios riri rirs risi riso riss riyo roio roir rois rooi roor roos rori roro rory rosi roso ross rosy roys rrrr rsis rsos ryis rysy s-ii s-os sior sios siri siro sirr sirs sisi siss sisy siyi soir sois soor soos sooy sori soro sorr sors sory sosi soso soss soyo soys sris sros ssis ssri ssrs sssi ssss syis syro syrs syry syso syss yirr yiss yori yoro yory yosi yoso yoyo ysii yyyy