-itis fili- fills filst firit first fissi fists fitil fitit fitri fitts flirr flirt flist flits friis frill friss frist frits fritt ftrtt if-- ifill ifits ifrit ifttt iiiii iiris iisir iitti ilfis iliff ilift illit iltis irill iris- iriss irrit irssi is-is isfit isili isill isisi isiti isits isitt istlt itfit itisi itsit ittti l-sit li-fi lifts liisi lilis lilli lilts liril lisis liss- lists litir litis litsi litti llrrs ltifr ri-fi riffs rifts rills risti ritts rlrts rsssf s-iii siftr sifts siili siirt silli sills silts siris sirsi sisil sisis sisli sissi sists sitit sitsi sitti slift slirt sliss slits slsts sssss stfis stiff stift stiif stiir still stils stilt stirs stirt stitt strif stril strit strrs ti-ti tiffs tifts tilfi tilli tills tilsi tilst tilts tiris tirit tirli tirls tirrs tirtl tisis tisri tiss- tissi titii titil titis titli titti trill tris- triss trist trit- trits tritt tsili tstlt ttttt