sill silo sils siod siol siop sios sipi sipo sipp sips sipy sisd sisi sisk siss sisy siyi skid skif skik skil skio skip skis skol skop skpo sksd skss sky- skyf skys skyy sl-i slds slid slik slip sllp slod sloo slop slos sloy slpi slpp slps slyp slys sodd sodo sods sody sofi sofo soif soik soil sois soki sokk soko sold solf soli solk soll solo solp sols soly sood soof sook sool soop soos sooy sopd sopi sopo sopp sops sopy sosi soso soss soyo soys spdf spdl spdp spdy spfs spik spio spip spis spkl splo splp spls spod spok spoo spop spos spoy sppd sppf spps spsd spso spsp spss spy- spys ssdd ssdf ssdp ssfl ssfp ssid ssis sslp ssop sspf sspl sspo ssps sssf sssi ssss sydi syds syff syfy syik syis syl- syli sylk syll syls sypo syso syss syyk ydil yidi yids yiff yild yili yill yips yisk yiss ykid ykko ylds ylid ylli ylls ylyk yodo yods yoff yoik yoki yoko yoks yoky yold yoli yolk yoll yolo yolp yoly yood yoof yook yool yoop yopo yopy yosi yoso yoyo ypfl ypsi ysii ysop yspi yyff yyyy