bidis ibdis bdiis dbiis idbis dibis biids ibids biids ibids iibds iibds bdiis dbiis bidis ibdis dibis idbis idibs diibs iidbs iidbs diibs idibs bidsi ibdsi bdisi dbisi idbsi dibsi bisdi ibsdi bsidi sbidi isbdi sibdi bdsii dbsii bsdii sbdii dsbii sdbii idsbi disbi isdbi sidbi dsibi sdibi biisd ibisd biisd ibisd iibsd iibsd bisid ibsid bsiid sbiid isbid sibid bisid ibsid bsiid sbiid isbid sibid iisbd iisbd isibd siibd isibd siibd bdisi dbisi bidsi ibdsi dibsi idbsi bdsii dbsii bsdii sbdii dsbii sdbii bisdi ibsdi bsidi sbidi isbdi sibdi disbi idsbi dsibi sdibi isdbi sidbi idisb diisb iidsb iidsb diisb idisb idsib disib isdib sidib dsiib sdiib iisdb iisdb isidb siidb isidb siidb disib idsib dsiib sdiib isdib sidib
Note: these 'words' (valid or invalid) are all the permutations of the word bidis. These words are obtained by scrambling the letters in bidis.