f--k ffff ffss fftf fofo foof fook foos foot foso foss fost foto fots fott foty foys foyt fsfo fssf ftfy ftos k-os kfff kffk kfok kfoo kfoy kfsk kfst kftk kftt kfyo kkfs kkft kkkk kkoo kkot kkoy kksf kkss kkst kktk kkts kkty kkys kkyy koff kofk kofo koft kofy kokf kokk koko koks koky kook kooo koos koot kos- kosf koso koss kost kosy kotk koto kots kott koty koyf koyo koyt koyy ksfo ksft kskf kskk ksko ksks ksky ksof ksok ksoo ksos ksso ksss ksst kstk ksto ksts kstt ksty ksyf ksyy ktfo ktfs ktfy ktkk ktko ktks ktkt ktok ktoo ktot ktoy ktsf ktso ktst ktsy kttf kttk ktto ktts kttt ktty kyfs kykk kyks kyky kyok kyoo kyos kyot kyoy kysf kysk kyst kyto kyts kytt kyty kyyk kyyo kyys kyyt kyyy off- offo offs offy ofst okko okok okot okso okto okyo ooff oofs oofy ooky oooo ooos oost oots ooty osoo osos osso ossy osts osyt oto- otof otok otoo otos otoy otso otto otts oyss oyst s-os sfos sfss sfts skot skss sky- skyf skys skyy sofo soft sokk soko soof sook soos soot sooy soso soss sost sotk soto sots soyo soys soyt ssot sssf ssss ssts stks stof stok stoo stos stot stoy stsf stss styf styk stys syff syfy syso syss syst sytt syyk tfot tfss tkof tkos tkts to-y toff tofo toft toko toky toof took toos toot tosk toso toss tost tosy toto tots tott toty toyo toys toyt tsks tsos tsoy tssf tsst tsts tsys ttff ttoy ttss tttt ttys tyff tyft tyss tyst tyto tytt tyty ykko ykyt yoff yoko yoks yoky yoof yook yoot yoso yost yott yoyo ytky yyff yyyy