pulli uplli pluli lpuli ulpli lupli pulli uplli pluli lpuli ulpli lupli pllui lplui pllui lplui llpui llpui ullpi lulpi ullpi lulpi llupi llupi pulil uplil pluil lpuil ulpil lupil puill upill piull ipull uipll iupll pliul lpiul pilul iplul lipul ilpul ulipl luipl uilpl iulpl liupl ilupl pulil uplil pluil lpuil ulpil lupil puill upill piull ipull uipll iupll pliul lpiul pilul iplul lipul ilpul ulipl luipl uilpl iulpl liupl ilupl plliu lpliu plliu lpliu llpiu llpiu plilu lpilu pillu ipllu liplu ilplu plilu lpilu pillu ipllu liplu ilplu llipu llipu lilpu illpu lilpu illpu ullip lulip ullip lulip lluip lluip ulilp luilp uillp iullp liulp ilulp ulilp luilp uillp iullp liulp ilulp lliup lliup lilup illup lilup illup
Note: these 'words' (valid or invalid) are all the permutations of the word pulli. These words are obtained by scrambling the letters in pulli.