roua roub roud rous rrad rras rrrr rsaa rscc rscs rsdd rsds rsos rssa rsua ruad ruas ruba rubb rubs rubu ruca ruda rudd rudo ruds rura rurc rurd ruro rurs ruru rusa ruso russ rusu ruud s-os sa-c saab saac saad saar saas saba sabb sabc sabo sabr sabs sabu saca sacc sacd saco sacr sacs sacu sada sadb sadc sadd sado sadr sads sadu saor saos saou sara sarc sard saro sarr sars saru sasa sasc sasd saso sass saua sauc saud saur saus sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbds sbor sbsa sbsd sbus scaa scab scac scad scar scas scba sccc sccs scda scdc scds scob scoo scor scr- scra scrc scrs scsa scsc scsd scso scsr scsu scua scub scud scur sdau sdba sdcc sdco sddc sdds sdrc sdrs sdsc sdss sdsu soad soar soas soba sobo sobr sobs sobu soca soco socr socs soda sodd sodo sods sodu sood soor soos sora sorb sord soro sorr sors soru sosa soso soss soud sour sous sras srbc srcc sros srsd srub ssaa ssab ssac ssao ssas ssau ssbr ssca sscc sscs ssdc ssdd ssoc ssra ssrc ssrs sssa sssb sssc ssss suar suas sub- suba subb subd subo subs suc- succ sucr sucs suda sudd sudo suds suor suos sur- sura surc surd suro surr surs suru sus- susa susd suso suss susu suus uabc uaca uaoc uarc uars uaru uasa uasd uaua ubac ubar ubba ubbo uboc ubod ubos ubra ubud ucad ucar ucas ucbc ucca ucdc ucdd ucos ucrc ucsa ucsb ucsc ucsd ucsu ucua udaa udad udar udas udau udbc udca udds udoo udos udra udsd uocc uor- urac urad urao uras urau urba urbs urca urda urds urdu uro- uroa uroo urra ursa urso urss ursu urur urus us-a usaa usac usad usar usas usba usbc usbr usbs usca uscc usco uscs usda usdc usdo usds usoc usos usra ussa ussb ussc ussr usss ussu usua usus uuoc uuuu