vwro wvro vrwo rvwo wrvo rwvo vwor wvor vowr ovwr wovr owvr vrow rvow vorw ovrw rovw orvw wrov rwov worv owrv rowv orwv
Note: these 'words' (valid or invalid) are all the permutations of the word vwro. These words are obtained by scrambling the letters in vwro.