debud edbud dbeud bdeud ebdud bedud deubd edubd duebd udebd eudbd uedbd dbued bdued dubed udbed buded ubded ebudd beudd eubdd uebdd buedd ubedd debdu edbdu dbedu bdedu ebddu beddu dedbu eddbu ddebu ddebu eddbu dedbu dbdeu bddeu ddbeu ddbeu bddeu dbdeu ebddu beddu edbdu debdu bdedu dbedu deudb edudb duedb udedb euddb ueddb dedub eddub ddeub ddeub eddub dedub dudeb uddeb ddueb ddueb uddeb dudeb euddb ueddb edudb deudb udedb duedb dbude bdude dubde udbde budde ubdde dbdue bddue ddbue ddbue bddue dbdue dudbe uddbe ddube ddube uddbe dudbe budde ubdde bdude dbude udbde dubde ebudd beudd eubdd uebdd buedd ubedd ebdud bedud edbud debud bdeud dbeud eudbd uedbd edubd deubd udebd duebd buded ubded bdued dbued udbed dubed
Note: these 'words' (valid or invalid) are all the permutations of the word debud. These words are obtained by scrambling the letters in debud.