k-os kkkk kkoo kkot kkov kkoy kkss kkst kktk kkts kktv kkty kkvt kkvv kkys kkyy kokk koko koks koky kook kooo koos koot koov kos- koso koss kost kosy kotk koto kots kott kotv koty kovk kovo koyo koyt koyy kskk ksko ksks ksky ksok ksoo ksos ksso ksss ksst kstk ksto ksts kstt kstv ksty ksvy ksyv ksyy ktkk ktko ktks ktkt ktok ktoo ktot ktoy ktso ktst ktsy kttk ktto ktts kttt kttv ktty ktvk ktvo ktvt ktvy ktyv kvok kvoo kvot kvov kvso kvss kvst kvsv kvtk kvto kvtt kvtv kvty kvvs kvvv kykk kyks kykv kyky kyok kyoo kyos kyot kyoy kysk kyst kyto kyts kytt kytv kyty kyvt kyyk kyyo kyys kyyt kyyy okko okok okot okso okto okyo ooky oooo ooos oost oots ooty osoo osos osov osso ossy osts osyt oto- otok otoo otos otov otoy otso otto otts ovo- ovoo ovot oyss oyst s-os s-vt skot skov skss sky- skys skyy sokk soko sook soos soot sooy soso soss sost sosv sotk soto sots sovo sovs soyo soys soyt ssot ssss ssts st-v stks stok stoo stos stot stoy stss stvs styk stys svoy syso syss syst sytt sytv syyk tkos tkts to-y toko toky took toos toot tosk toso toss tost tosy toto tots tott toty tovo toyo toys toyt tsks tsos tsoy tsst tsts tsys ttoy ttss tttt ttys tvos tvss tvtv tvyo tyss tyst tyto tytt tyty voks voky voot voso voss voto vovk voys vsto vvvv vyos vyso vyss ykko ykyt yoko yoks yoky yook yoot yoso yost yott yoyo ytky yvto yyyy