iiii iiio iiis iiit iioi iioo iios iirs iisi iisr iist iitr iitt iiwi ioii ioio ioit iooi iooo ioos iori iors ioso ioto iri- irio iris irri irrs irti irts isis isit iso- isor isos isri issi isso issr isss isti isto istr ists itis itoi itoo itor itos itri itrs itsi itso itto iwis iwiw oiii oios oirt oist oiti oooo ooos oort oosi oost oots ootw ori- orio oris orit oro- oror oros orot orri orro orrs orsi orso orto orts orwo osii osis osoi osoo osor osos osow osro ossi osso osti ostr osts otis otit oto- otoo otor otos otow otro otrs otso otti otto otts otwo owir owow owt- owtt riis rios riot riri rirs risi riso riss rist riti rito rits ritt riwo roio roir rois roit rooi roor roos root rori roro rort rosi roso ross rost roti roto rotr rots rott rowi rowr rows rowt roww rrrr rsis rsos rsts rtss rtts s-ii s-os siit sior sios siot siri siro sirr sirs sirt sisi siss sist sit- siti sito sits sitt siwi soir sois soit soor soos soot sori soro sorr sors sort sosi soso soss sost soto sots sotw sowi sowr sows sowt sris sros srtr ssis ssit ssot ssri ssrs sssi ssss ssts ssws stio stir stis stit stoo stor stos stot stow stri stro strs stsi stss sttr swir swis swit swoo swor swot swow swss swts tiit tios tiri tiro tirr tirs tisi tiso tiss tist titi tito tits titt tiwi tois toit toor toos toot tori toro torr tors tort tosi toso toss tost toti toto totr tots tott tows tri- trio tris trit troi troo tros trot trow trsi trst trtr tsis tsoi tsos tssi tssr tsst tsts ttss tttt twi- twis twit two- twoo twos twot twss wiii wiis wiit wioi wioo wios wiot wiri wiro wirr wirt wiso wisr wiss wist wisw witi witr wits witt wiwi woio woir wois woos woot woow wori woro worr wors wort worw woso woss wost wosw wotr wots wott wotw wowi wowo wows wowt woww writ wroi wroo wros wrot wrow wrro wrrs wrrw wrsi wrso wrsr wrss wrsw wrti wrto wrtr wrts wrtw wrwr wsir wsis wsoo wsor wsos wsri wsro wsrs wsrt wsrw wssi wssr wsss wsst wssw wsto wstr wsts wstt wstw wswi wswr wsws wswt wsww wtis wtor wtot wtow wtri wtro wtrs wtrt wtrw wtso wtsr wtss wtti wtto wttr wtts wttt wttw wtwo wtwr wtws wtwt wtww wwii wwio wwis wwor wwos wwot wwow wwrr wwrw wwsi wwsr wwss wwst wwti wwtr wwtw wwwi wwwr wwws wwww