rueda ureda reuda eruda uerda eurda rudea urdea rduea druea udrea durea redua erdua rdeua dreua edrua derua uedra eudra udera duera edura deura ruead uread reuad eruad uerad eurad ruaed uraed raued arued uared aured reaud eraud raeud areud earud aerud ueard euard uaerd auerd eaurd aeurd rudae urdae rduae druae udrae durae ruade urade raude arude uarde aurde rdaue draue radue ardue darue adrue udare duare uadre audre daure adure redau erdau rdeau dreau edrau derau readu eradu raedu aredu eardu aerdu rdaeu draeu radeu ardeu dareu adreu edaru dearu eadru aedru daeru aderu uedar eudar udear duear eduar deuar ueadr euadr uaedr auedr eaudr aeudr udaer duaer uader auder dauer aduer edaur deaur eadur aedur daeur adeur
Note: these 'words' (valid or invalid) are all the permutations of the word rueda. These words are obtained by scrambling the letters in rueda.