zebub ezbub zbeub bzeub ebzub bezub zeubb ezubb zuebb uzebb euzbb uezbb zbueb bzueb zubeb uzbeb buzeb ubzeb ebuzb beuzb eubzb uebzb buezb ubezb zebbu ezbbu zbebu bzebu ebzbu bezbu zebbu ezbbu zbebu bzebu ebzbu bezbu zbbeu bzbeu zbbeu bzbeu bbzeu bbzeu ebbzu bebzu ebbzu bebzu bbezu bbezu zeubb ezubb zuebb uzebb euzbb uezbb zebub ezbub zbeub bzeub ebzub bezub zubeb uzbeb zbueb bzueb ubzeb buzeb eubzb uebzb ebuzb beuzb ubezb buezb zbube bzube zubbe uzbbe buzbe ubzbe zbbue bzbue zbbue bzbue bbzue bbzue zubbe uzbbe zbube bzube ubzbe buzbe bubze ubbze bbuze bbuze ubbze bubze ebubz beubz eubbz uebbz buebz ubebz ebbuz bebuz ebbuz bebuz bbeuz bbeuz eubbz uebbz ebubz beubz ubebz buebz bubez ubbez bbuez bbuez ubbez bubez
Note: these 'words' (valid or invalid) are all the permutations of the word zebub. These words are obtained by scrambling the letters in zebub.