iiii iiis iirs iisi iisr iisu inis inni innr inns innu inri inrs inss insu inui inun inus iri- irin iris irri irrs irun irus isin isis isri issi issr isss issu isus iuiu iuss n-ii niir niiu nini nins nirs niru nisi niss nisu niur nnnn nnss nsin nsis nsnr nssr nsss nuin nunn nuns nuri nurn nurr nurs nuru nusi nuss nusu riin riis rinn riri rirs risi riss risu rius rnin rrrr rrun rsis rsnn rsnr ruin ruis runi runn runs ruri rurs ruru rusi russ rusu ruun s-ii sini sinn sins sinu siri sirr sirs siru sisi siss sisu siui sius snir snns snrs snur snus sris srni srnn ssin ssis ssns ssri ssrs sssi ssss suin suir suis sun- suni sunn suns sunu sur- suri surn surr surs suru sus- susi suss susu suus uirr uni- unii unin unir unis unni unns unrs uns- unus urin uris uriu urni urns urri ursi urss ursu urun urur urus usin usis usnr usnu ussr usss ussu usui usun usus uuni uuri uusi uuuu