rous rras rrna rrrr rrun rsaa rsai rsbi rsis rsna rsnn rsno rsnr rsos rssa rsua ruan ruas ruba rubb rubi rubs rubu ruin ruis runa runi runn runo runs rura ruri ruro rurs ruru rusa rusi ruso russ rusu ruun s-ib s-ii s-os saab saan saar saas saba sabb sabi sabo sabr sabs sabu saia sain sair sais sana sani sann sano sanr sans sanu saoi saon saor saos saou sara sari sarn saro sarr sars saru sasa sasi saso sass saua saun saur saus sbaa sbai sbar sbas sbbs sbia sbor sbsa sbsi sbus siaa siab siai sian sias siau siba sibi sibo sibs sibu sina sini sinn sino sins sinu sion sior sios siou sira siri siro sirr sirs siru sisa sisi siss sisu siui sius snab snar snas snba snia snib snir snns snoa snob snoo snor snos snra snrs snub snur snus soan soar soas soba sobo sobr sobs sobu soia soin soir sois son- sona soni sono sons sonu soon soor soos sora sorb sori sorn soro sorr sors soru sosa sosi soso soss soun sour sous sras srib sris srna srni srnn srno sros srub ssaa ssab ssan ssao ssas ssau ssbn ssbr ssin ssis ssns ssra ssri ssrs sssa sssb sssi ssss suan suar suas sub- suba subb subi subo subs suin suio suir suis sun- suna sunb suni sunn suno suns sunu suor suos sur- sura suri surn suro surr surs suru sus- susa susi suso suss susu suus uair uars uaru uasa uaua ubar ubba ubbi ubbo ubii ubir ubis ubon ubos ubra uira uirr unaa unai unan unar unas unau uni- unia unii unin unio unir unis unna unni unno unns unon unos unra unro unrs uns- unsa unso unus uor- urai uran urao uras urau urba urbi urbs uria urib urin uris uriu urna urni urns uro- uroa uroo urra urri ursa ursi urso urss ursu urun urur urus us-a usaa usan usar usas usba usbr usbs usia usin usis usna usno usnr usnu usoi usos usra ussa ussb ussr usss ussu usua usui usun usus uuni uuno uuri uusi uuuu