sorh soro sorr sors soru sosh soso soss soud souf sour sous srbc srcc srch srfc srhs sros srsd srub ssbr sscc sscs ssdc ssdd ssdf ssfc sshs ssoc ssrc ssrs sssb sssc sssf sssh ssss sub- subb subd subh subo subs suc- succ such sucr sucs sudd sudh sudo suds suf- sufc suff sufr sufs sufu suhb suho suhr suoh suor suos sur- surc surd surf suro surr surs suru sus- susd suso suss susu suus ubbo uboc ubod ubos ubud ucbc ucdc ucdd ucfb ucho uchs ucos ucrc ucsb ucsc ucsd ucsf ucsu udbc udds udoh udoo udos udsd ufcu ufos uh-d uhoh uhrs uhss uhuh uocc uofo uor- urbs urch urds urdu urff urho uro- uroo urrh urso urss ursu urur urus usbc usbr usbs uscc uscf usch usco uscs usdc usdf usdo usds usfc usfs usho ushr ushs ushu usoc usos ussb ussc ussf ussr usss ussu usus uuoc uuuu