zappy azppy zpapy pzapy apzpy pazpy zappy azppy zpapy pzapy apzpy pazpy zppay pzpay zppay pzpay ppzay ppzay appzy papzy appzy papzy ppazy ppazy zapyp azpyp zpayp pzayp apzyp pazyp zaypp azypp zyapp yzapp ayzpp yazpp zpyap pzyap zypap yzpap pyzap ypzap apyzp payzp aypzp yapzp pyazp ypazp zapyp azpyp zpayp pzayp apzyp pazyp zaypp azypp zyapp yzapp ayzpp yazpp zpyap pzyap zypap yzpap pyzap ypzap apyzp payzp aypzp yapzp pyazp ypazp zppya pzpya zppya pzpya ppzya ppzya zpypa pzypa zyppa yzppa pyzpa ypzpa zpypa pzypa zyppa yzppa pyzpa ypzpa ppyza ppyza pypza yppza pypza yppza appyz papyz appyz papyz ppayz ppayz apypz paypz ayppz yappz pyapz ypapz apypz paypz ayppz yappz pyapz ypapz ppyaz ppyaz pypaz yppaz pypaz yppaz
Note: these 'words' (valid or invalid) are all the permutations of the word zappy. These words are obtained by scrambling the letters in zappy.