ffff ffii ffrr ffss fftf fiff fifi fifo fift fiii fior fios firs firy fisi fiss fist fiti fits fitt fofo fois foof foos foot for- fori foro forr fors fort fosi foso foss fost foti foto fots fott foty foys foyt frio fris frit fros frot frso frst frys fsfi fsfo fssf ftfy ftii ftos ftrs ftsr fyfi fyrs fyry fyti iffy ifis ifit ifor ifrf ifri ifso ifto ifyo iiii iiio iiis iiit iioi iioo iios iirs iisi iisr iist iitr iitt ioii ioio ioit ioof iooi iooo ioos iori iors ioso iotf ioto iri- irio iris iriy irri irrs irsf irtf irti irts isis isit iso- isof isor isos isri issf issi isso issr isss issy isti isto istr ists isty isys itif itis itof itoi itoo itor itos itrf itri itrs itry itsf itsi itso itsy ittf itto itty iyos off- offo offr offs offy ofit ofor ofst oiii oios oirt oiry oist oiti ooff oofs oofy oooo ooos oort oory oosi oost oots ooty orff orfi orfs ori- orif orio oris orit oro- orof oror oros orot oroy orri orro orrs orry orsi orso orsy orto orts orys osii osis osoi osoo osor osos osro ossi osso ossy osti ostr osts osyt otif otis otit oto- otof otoo otor otos otoy otro otrs otry otso otti otto otts otyr oyri oyss oyst riff rifs rift riif riis rios riot riri rirs risi riso riss rist riti rito rits ritt riyf riyo roff rofo roif roio roir rois roit roof rooi roor roos root rori roro rort rory rosi roso ross rost rosy roti roto rotr rots rott roty roys royt rrif rrrr rsis rsos rsts rtss rtts ryff ryft ryif ryis ryot rysy rytt ryyf ryyt s-ii s-os sfio sfor sfos sfro sfss sfts siff sifo sifr sift sify siit sior sios siot sirf siri siro sirr sirs sirt sisi siss sist sisy sit- siti sito sits sitt sity siyi sofi sofo soft soif soir sois soit soof soor soos soot sooy sori soro sorr sors sort sory sosi soso soss sost soto sots soyo soys soyt srfi sris sros srtr ssis ssit ssot ssri ssrs sssf sssi ssss ssts stif stio stir stis stit stof stoo stor stos stot stoy stri stro strs stry stsf stsi stss sttr styf styr stys syff syfy syis syro syrs syrt syry syso syss syst sytt tfot tfrs tfsi tfss tiff tifo tift tiit tios tiri tiro tirr tirs tiry tisi tiso tiss tist titi tito tits titt tiyi tiyo to-y toff tofi tofo toft tois toit toof toor toos toot torf tori toro torr tors tort tory tosi toso toss tost tosy toti toto totr tots tott toty toyo toys toyt trfr tri- trif trio tris trit troi troo tros trot troy trsi trst trtr try- tryo trys tsis tsoi tsos tsoy tssf tssi tssr tsst tsts tsys ttff ttoy ttss tttt ttys tyff tyft tyir tyr- tyrf tyro tyrr tyss tyst tyti tyto tytt tyty yiff yift yirr yiss yist yiti yoff yoit yoof yoot yori yoro yort yory yosi yoso yost yott yoyo yrof ysii yyff yyyy