drail rdail daril adril radil ardil drial rdial diral idral ridal irdal dairl adirl diarl idarl aidrl iadrl raidl aridl riadl iradl airdl iardl drali rdali darli adrli radli ardli drlai rdlai dlrai ldrai rldai lrdai dalri adlri dlari ldari aldri ladri raldi arldi rladi lradi alrdi lardi drila rdila dirla idrla ridla irdla drlia rdlia dlria ldria rldia lrdia dilra idlra dlira ldira ildra lidra rilda irlda rlida lrida ilrda lirda dailr adilr dialr idalr aidlr iadlr dalir adlir dlair ldair aldir ladir dilar idlar dliar ldiar ildar lidar aildr ialdr alidr laidr iladr liadr raild arild riald irald airld iarld ralid arlid rlaid lraid alrid larid rilad irlad rliad lriad ilrad lirad ailrd ialrd alird laird ilard liard
Note: these 'words' (valid or invalid) are all the permutations of the word drail. These words are obtained by scrambling the letters in drail.