expde xepde epxde pexde xpede pxede exdpe xedpe edxpe dexpe xdepe dxepe epdxe pedxe edpxe depxe pdexe dpexe xpdee pxdee xdpee dxpee pdxee dpxee exped xeped epxed pexed xpeed pxeed exepd xeepd eexpd eexpd xeepd exepd epexd peexd eepxd eepxd peexd epexd xpeed pxeed xeped exped pexed epxed exdep xedep edxep dexep xdeep dxeep exedp xeedp eexdp eexdp xeedp exedp edexp deexp eedxp eedxp deexp edexp xdeep dxeep xedep exdep dexep edxep epdex pedex edpex depex pdeex dpeex epedx peedx eepdx eepdx peedx epedx edepx deepx eedpx eedpx deepx edepx pdeex dpeex pedex epdex depex edpex xpdee pxdee xdpee dxpee pdxee dpxee xpede pxede xepde expde pexde epxde xdepe dxepe xedpe exdpe dexpe edxpe pdexe dpexe pedxe epdxe depxe edpxe
Note: these 'words' (valid or invalid) are all the permutations of the word expde. These words are obtained by scrambling the letters in expde.