iiii iiis iiit iisi iist iitt inis init inni inns inny inss inst inti intn ints isin isis isit isnt issi isss issy isti ists isty isys itin itis itsi itsy itty n-ii niit nini nins nisi niss nist niti nits nity niyi nnit nnnn nnss nntn nsin nsis nsss nsts ntis ntss nyit nynt nyny nyss nyst s-ii siit sini sinn sins sint siny sisi siss sist sisy sit- siti sitn sits sitt sity siyi snit snns snsy snys ssin ssis ssit ssns sssi ssss ssts stis stit stnn stns stsi stss stys syis syn- syns syny syss syst sytt tiit tini tinn tins tint tiny tisi tiss tist titi tits titt tiyi tiyn tnts tsin tsis tssi tsst tsts tsys ttss tttt ttys tyin tynt tyny tyss tyst tyti tytt tyty tyyn yins yiss yist yiti ysii yyyy