ffff ffii ffss fftf fiff fifi fifo fift fiii fiil fili fill filo fils fios fisi fiss fist fiti fits fitt flii flis flit floo flos flot floy flts flyi flys flyt fofo foil fois foli foll folo fols folt foly foof fool foos foot fosi foso foss fost foti foto fots fott foty foyl foys foyt fsfi fsfo fssf ft-l ftfy ftii ftos fyfi fyli fyti iffy ifil ifis ifit ifso ifto ifyo iiii iiio iiis iiit iioi iioo iios iisi iist iitt ilio ilis ilit ill- illi illo ills illt illy iloo ilos ilot ilts ioii ioio ioit iolo ioof iooi iooo ioos ioso iotf ioto isil isis isit isls isly iso- isof isol isos issf issi isso isss issy isti isto ists isty isyl isys itif itil itis itll itof itoi itol itoo itos itsf itsi itso itsy ittf itto itty iyos lfts liff lifl lifo lift liii liis lili lill lilo lils lilt lily lio- lios lisi liso liss list lisy liti litl lito lits litt lity liyl llll lloo loff lofi loft loif lois loit loli loll lolo lols loly loof lool loos loot losi loso loss lost losy loti lotl loto lots lott loys lsof lsso lsts ltsi lyff lyft lyfy lyif lyit lyly lyo- lyot lys- lysi lysl lyso lyss lyst lyto lytt lyyf off- offo offs offy ofit ofst oiii oils oily oios oist oiti oiyl olfs olio olis olit olli ollo olly olof olos olot olsi olst olyf ooff oofs oofy oolo oooo ooos oosi oost oots ooty osii osis osli oslo osoi osoo osos ossi osso ossy osti osts osyt otif otis otit oto- otof otoo otos otoy otso otti otto otts oyls oyly oyss oyst s-ii s-os sfio sfls sfos sfss sfts siff sifl sifo sift sify siit sil- silf sili sill silo sils silt siol sios siot sisi siss sist sisy sit- siti sito sits sitt sity siyi sl-i slft slit sloo slos slot sloy slst slts slys sofi sofo soft soif soil sois soit solf soli soll solo sols solt soly soof sool soos soot sooy sosi soso soss sost sotl soto sots soyo soys soyt ssfl ssis ssit sslt ssot sssf sssi ssss sstl ssts stif stil stio stis stit stlo stlt stof stol stoo stos stot stoy stsf stsi stss styf styl stys syff syfy syis syl- syli syll syls sylt syso syss syst sytt tfot tfsi tfss tiff tifo tift tiit till tilo tils tilt tily tios tisi tiso tiss tist titi tito tits titt tiyi tiyo tlli tlos to-y toff tofi tofo toft toil tois toit tol- toli toll tolo tolt toly toof tool toos toot tosi toso toss tost tosy toti toto tots tott toty toyl toyo toys toyt tsfl tsis tsoi tsol tsos tsoy tssf tssi tsst tsts tsys ttff ttoy ttss tttt ttyl ttys tyff tyft tyl- tyll tylo tyss tyst tyti tyto tytt tyty yiff yift yili yill yilt yiss yist yiti ylli ylls yoff yoit yoli yoll yolo yoly yoof yool yoot yosi yoso yost yott yoyo ysii yyff yyyy