valid avlid vlaid lvaid alvid lavid vaild avild viald ivald aivld iavld vliad lviad vilad ivlad livad ilvad alivd laivd ailvd ialvd liavd ilavd valdi avldi vladi lvadi alvdi lavdi vadli avdli vdali dvali advli davli vldai lvdai vdlai dvlai ldvai dlvai aldvi ladvi adlvi dalvi ldavi dlavi vaidl avidl viadl ivadl aivdl iavdl vadil avdil vdail dvail advil davil vidal ivdal vdial dvial idval dival aidvl iadvl adivl daivl idavl diavl vlida lvida vilda ivlda livda ilvda vldia lvdia vdlia dvlia ldvia dlvia vidla ivdla vdila dvila idvla divla lidva ildva ldiva dliva idlva dilva alidv laidv aildv ialdv liadv iladv aldiv ladiv adliv daliv ldaiv dlaiv aidlv iadlv adilv dailv idalv dialv lidav ildav ldiav dliav idlav dilav
Note: these 'words' (valid or invalid) are all the permutations of the word valid. These words are obtained by scrambling the letters in valid.