yrivd ryivd yirvd iyrvd riyvd iryvd yrvid ryvid yvrid vyrid rvyid vryid yivrd iyvrd yvird vyird ivyrd viyrd rivyd irvyd rviyd vriyd ivryd viryd yridv ryidv yirdv iyrdv riydv irydv yrdiv rydiv ydriv dyriv rdyiv dryiv yidrv iydrv ydirv dyirv idyrv diyrv ridyv irdyv rdiyv driyv idryv diryv yrvdi ryvdi yvrdi vyrdi rvydi vrydi yrdvi rydvi ydrvi dyrvi rdyvi dryvi yvdri vydri ydvri dyvri vdyri dvyri rvdyi vrdyi rdvyi drvyi vdryi dvryi yivdr iyvdr yvidr vyidr ivydr viydr yidvr iydvr ydivr dyivr idyvr diyvr yvdir vydir ydvir dyvir vdyir dvyir ivdyr vidyr idvyr divyr vdiyr dviyr rivdy irvdy rvidy vridy ivrdy virdy ridvy irdvy rdivy drivy idrvy dirvy rvdiy vrdiy rdviy drviy vdriy dvriy ivdry vidry idvry divry vdiry dviry
Note: these 'words' (valid or invalid) are all the permutations of the word yrivd. These words are obtained by scrambling the letters in yrivd.