iiii iiis iiit iirs iisi iisr iist iisu iitr iitt inis init inni innr inns innu inri inrs inss inst insu inti intn intr ints intu inui inun inus iri- irin iris irri irrs irti irts irun irus isin isis isit isnt isri issi issr isss issu isti istr ists isus itin itis itri itrs itsi itsu itur iuiu iuss iust n-ii niir niit niiu nini nins nirs nirt niru nisi niss nist nisu niti nitr nits niur nnit nnnn nnss nntn nrts nsin nsis nsnr nssr nsss nsts nstu ntis ntnu ntru ntss ntsu nttr ntui nuin nuit nunn nuns nunt nuri nurn nurr nurs nurt nuru nusi nuss nust nusu nuts nutt nutu riin riis rinn riri rirs risi riss rist risu riti rits ritt ritu rius rnin rnnt rnut rrrr rrun rsis rsnn rsnr rsts rstu rtns rtss rtts ruin ruis ruit runi runn runs runt ruri rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruun s-ii siit sini sinn sins sint sinu siri sirr sirs sirt siru sisi siss sist sisu sit- siti sitn sits sitt situ siui sius siut snir snit snns snrs sntr snur snus sris srni srnn srtr ssin ssis ssit ssns ssri ssrs sssi ssss ssts stir stis stit stnn stnr stns stri strn strs stru stsi stss sttr stun stur stus stut suin suir suis suit sun- suni sunn suns sunt sunu sur- suri surn surr surs surt suru sus- susi suss sust susu suti sutu suus tiit tiiu tini tinn tins tint tinu tiri tirr tirs tiru tisi tiss tist titi tits titt titu tnts tnut tri- trin tris trit trsi trst trtr trun trus trut truu tsin tsis tssi tssr tsst tsts tsui tsun ttss tttt tuin tuis tuit tuiu tuni tunn tuns tunu turi turn turr turs turt turu tusi tuss tust tuti tuts tutt tutu uint uirr uist uits uni- unii unin unir unis unit unni unns unrs uns- unst unts unus unut urin uris uriu urni urns urri ursi urss ursu urts urun urur urus urut usin usis usnr usnu ussr usss usst ussu usti usts usui usun usus utin utis utri utti uttu uuni uuri uusi uuuu