sker skes skhs skoe skor skss skue skur soce soch sock soco socr socs soec soeo soes sohh soho sohs sohu soke sokk soko soku sook soor soos sore sorh soro sorr sors soru sose sosh soso soss soue souk sour sous srcc srch srec sreo sres srhs sros sscc ssce sscs ssec ssee sses sshs ssoc ssrc ssrs sssc sssh ssss suc- succ such suck sucr sucs suee suer sues sueu suho suhr suke sukh suks suku suoh suor suos sur- surc sure suro surr surs suru sus- suse susk suso suss susu suus uces uche ucho uchs ucos ucrc ucsc ucsu uers uess uher uhoh uhok uhrs uhss uhuh ukcc ukek ukes ukeu ukko ukok ukrc uksc ukur uocc uoke uor- uore urch ure- ureh ures urho urke uro- urok uroo urre urrh urse urso urss ursu uruk urur urus us-k uscc usce usch usco uscs usee user uses usho ushr ushs ushu uske usoc usoe usos ussc usse ussr usss ussu usus uuoc uuuu