druxy rduxy durxy udrxy rudxy urdxy drxuy rdxuy dxruy xdruy rxduy xrduy duxry udxry dxury xdury uxdry xudry ruxdy urxdy rxudy xrudy uxrdy xurdy druyx rduyx duryx udryx rudyx urdyx dryux rdyux dyrux ydrux rydux yrdux duyrx udyrx dyurx ydurx uydrx yudrx ruydx urydx ryudx yrudx uyrdx yurdx drxyu rdxyu dxryu xdryu rxdyu xrdyu dryxu rdyxu dyrxu ydrxu rydxu yrdxu dxyru xdyru dyxru ydxru xydru yxdru rxydu xrydu ryxdu yrxdu xyrdu yxrdu duxyr udxyr dxuyr xduyr uxdyr xudyr duyxr udyxr dyuxr yduxr uydxr yudxr dxyur xdyur dyxur ydxur xydur yxdur uxydr xuydr uyxdr yuxdr xyudr yxudr ruxyd urxyd rxuyd xruyd uxryd xuryd ruyxd uryxd ryuxd yruxd uyrxd yurxd rxyud xryud ryxud yrxud xyrud yxrud uxyrd xuyrd uyxrd yuxrd xyurd yxurd
Note: these 'words' (valid or invalid) are all the permutations of the word druxy. These words are obtained by scrambling the letters in druxy.