reird erird rierd irerd eirrd ierrd rerid errid rreid rreid errid rerid rired irred rried rried irred rired eirrd ierrd erird reird irerd rierd reidr eridr riedr iredr eirdr ierdr redir erdir rdeir dreir edrir derir rider irder rdier drier idrer direr eidrr iedrr edirr deirr iderr dierr rerdi errdi rredi rredi errdi rerdi redri erdri rderi dreri edrri derri rrdei rrdei rdrei drrei rdrei drrei erdri redri edrri derri rderi dreri rirde irrde rride rride irrde rirde ridre irdre rdire drire idrre dirre rrdie rrdie rdrie drrie rdrie drrie irdre ridre idrre dirre rdire drire eirdr ierdr eridr reidr iredr riedr eidrr iedrr edirr deirr iderr dierr erdir redir edrir derir rdeir dreir irder rider idrer direr rdier drier
Note: these 'words' (valid or invalid) are all the permutations of the word reird. These words are obtained by scrambling the letters in reird.