filfil filius filli- fillis fislis fissi- fitful fittit fluffs fulfil fusils futtsu i-suit ifitis illfit illful illlit isists istisu itfits itslit lifful lifull lilius lillis lilliu lituit lituus liulis ltsulu lufful lullus lutist siiiii silili silius sisisi sistil sisulu sluffs stiffs stilfs stilli stills stilts stilus stu-ii stuffs stuill stulls stulti suffit sufli suists sulili susulu tiff-f tiflis tilius tillis tilsit tiltil tisili titius titlis tituli tituss tuiuti tullus tussis tutill tuttis tuttul tuttut ulfuls ulitis ulutiu ustult utilis