iiii iiis iiit iisi iist iitt inis init inni inns inss inst inti intn ints invs invt isin isis isit isnt issi isss isti ists itin itis itsi ivin n-ii n-tv niit nini nins nisi niss nist niti nits nnit nnnn nnss nntn nnvt nsin nsis nsss nsts ntis ntss nttv nvis nvss nvtv s-ii s-iv s-vt siit sini sinn sins sint sisi siss sist sit- siti sitn sits sitt sivi snit snns sntv snvi ssin ssis ssit ssns sssi ssss ssts st-v stis stit stnn stns stsi stss stvs svit svns tiit tini tinn tins tint tisi tiss tist titi tits titt tivi tnts tsin tsis tsiv tssi tsst tsts tsvi ttss tttt tvis tvni tvsn tvss tvtv viii vini vins vint visi visn viss vist viti vitt vivi vt-i vvvv