iiii iiis iiit iirs iisi iisr iist iitr iitt inis init inni innr inns inri inrs inss inst inti intn intr ints iri- irin iris irri irrs irti irts isin isis isit isnt isri issi issr isss isti istr ists itin itis itri itrs itsi n-ii niir niit nini nins nirs nirt nisi niss nist niti nitr nits nnit nnnn nnss nntn nrts nsin nsis nsnr nssr nsss nsts ntis ntss nttr riin riis rinn riri rirs risi riss rist riti rits ritt rnin rnnt rrrr rsis rsnn rsnr rsts rtns rtss rtts s-ii siit sini sinn sins sint siri sirr sirs sirt sisi siss sist sit- siti sitn sits sitt snir snit snns snrs sntr sris srni srnn srtr ssin ssis ssit ssns ssri ssrs sssi ssss ssts stir stis stit stnn stnr stns stri strn strs stsi stss sttr tiit tini tinn tins tint tiri tirr tirs tisi tiss tist titi tits titt tnts tri- trin tris trit trsi trst trtr tsin tsis tssi tssr tsst tsts ttss tttt