sisi siss sisy siyi sl-i slcc slee slep sler sles sley slic slie slip slir sllp slpi slpp slps slrc slre slrp slrs slsc slye slyp slys spcc spcs spec spee spel sper spes spey spic spie spip spir spis splc sple splp splr spls spps spri sprs spry spse spsp spss spy- spyr spys srcc srec sres sris srpc srps srsp sscc ssce ssci sscp sscs ssec ssee ssep sses ssis sslc ssle sslp sspc sspe sspl ssps ssrc ssri ssrl ssrs sssc sssi ssss syce sycr syer syes syis syl- syle syli syll syls sype syre syrs syry syse syss yccc ycee ycie yeel yeep yeer yees yeie yeii yeir yele yeli yell yelp yepe yepp yeps yere yeri yerl yerr yers yery yesi yess yeye yeyi yeyr yile yili yill yipe yips yire yirr yise yiss ylle ylli ylls ypcc ypir ypsi yrle yrly ysee ysel yser yses ysii ysle yspi ysse yyyy