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