slrs slsc slsu slub sluc slue slur srbc srcc sreb srec sres srib sris srub ssbr sscc ssce ssci sscs ssec ssee sses ssis sslc ssle ssrc ssri ssrl ssrs sssb sssc sssi ssss sub- subb subi subl subs suc- succ suci sucr sucs suee suel suer sues sueu suie suir suis sul- sulc sule suli sull sulu sur- surc sure suri surr surs suru sus- suse susi suss susu suus u-ie ubbe ubbi uber ubic ubii ubir ubis uble ubli ubls ucbc ucci ucel uces ucil ucrc ucsb ucsc ucsu ueir uele ueli uell uers uess uies uile uirr uise ulbc ulcc uleb ulee ules ulic ulie ulle ulli ullr ulul ulus urbe urbi urbs urci ure- ures urib uric urie uris uriu urle urls urre urri urse ursi urss ursu urur urus usbc usbe usbl usbr usbs uscc usce uscs usee usel user uses usie usis usle uslu ussb ussc usse ussr usss ussu usui usul usus uulu uuri uusi uuuu