pipul ippul ppiul ppiul ippul pipul piupl ipupl puipl upipl iuppl uippl ppuil ppuil pupil uppil pupil uppil ipupl piupl iuppl uippl puipl upipl piplu ipplu ppilu ppilu ipplu piplu pilpu iplpu plipu lpipu ilppu lippu ppliu ppliu plpiu lppiu plpiu lppiu iplpu pilpu ilppu lippu plipu lpipu piulp ipulp puilp upilp iuplp uiplp pilup iplup pliup lpiup ilpup lipup pulip uplip pluip lpuip ulpip lupip iulpp uilpp ilupp liupp ulipp luipp ppuli ppuli pupli uppli pupli uppli pplui pplui plpui lppui plpui lppui pulpi uplpi plupi lpupi ulppi luppi pulpi uplpi plupi lpupi ulppi luppi ipulp piulp iuplp uiplp puilp upilp iplup pilup ilpup lipup pliup lpiup iulpp uilpp ilupp liupp ulipp luipp pulip uplip pluip lpuip ulpip lupip
Note: these 'words' (valid or invalid) are all the permutations of the word pipul. These words are obtained by scrambling the letters in pipul.