poilu opilu piolu ipolu oiplu ioplu poliu opliu ploiu lpoiu olpiu lopiu pilou iplou pliou lpiou ilpou lipou oilpu iolpu olipu loipu ilopu liopu poiul opiul pioul ipoul oipul iopul pouil opuil puoil upoil oupil uopil piuol ipuol puiol upiol iupol uipol oiupl ioupl ouipl uoipl iuopl uiopl polui oplui ploui lpoui olpui lopui pouli opuli puoli upoli oupli uopli pluoi lpuoi puloi uploi lupoi ulpoi olupi loupi oulpi uolpi luopi ulopi piluo ipluo pliuo lpiuo ilpuo lipuo piulo ipulo puilo upilo iuplo uiplo pluio lpuio pulio uplio lupio ulpio ilupo liupo iulpo uilpo luipo ulipo oilup iolup oliup loiup iloup lioup oiulp ioulp ouilp uoilp iuolp uiolp oluip louip oulip uolip luoip uloip iluop liuop iulop uilop luiop uliop
Note: these 'words' (valid or invalid) are all the permutations of the word poilu. These words are obtained by scrambling the letters in poilu.