reval erval rveal vreal evral veral reavl eravl raevl arevl earvl aervl rvael vrael ravel arvel varel avrel evarl vearl eavrl aevrl vaerl averl revla ervla rvela vrela evrla verla relva erlva rleva lreva elrva lerva rvlea vrlea rlvea lrvea vlrea lvrea evlra velra elvra levra vlera lvera realv eralv raelv arelv earlv aerlv relav erlav rleav lreav elrav lerav ralev arlev rlaev lraev alrev larev ealrv aelrv elarv learv alerv laerv rvale vrale ravle arvle varle avrle rvlae vrlae rlvae lrvae vlrae lvrae ralve arlve rlave lrave alrve larve valre avlre vlare lvare alvre lavre evalr vealr eavlr aevlr vaelr avelr evlar velar elvar levar vlear lvear ealvr aelvr elavr leavr alevr laevr valer avler vlaer lvaer alver laver
Note: these 'words' (valid or invalid) are all the permutations of the word reval. These words are obtained by scrambling the letters in reval.