bubba ubbba bbuba bbuba ubbba bubba bubba ubbba bbuba bbuba ubbba bubba bbbua bbbua bbbua bbbua bbbua bbbua ubbba bubba ubbba bubba bbuba bbuba bubab ubbab bbuab bbuab ubbab bubab buabb ubabb baubb abubb uabbb aubbb bbaub bbaub babub abbub babub abbub ubabb buabb uabbb aubbb baubb abubb bubab ubbab bbuab bbuab ubbab bubab buabb ubabb baubb abubb uabbb aubbb bbaub bbaub babub abbub babub abbub ubabb buabb uabbb aubbb baubb abubb bbbau bbbau bbbau bbbau bbbau bbbau bbabu bbabu babbu abbbu babbu abbbu bbabu bbabu babbu abbbu babbu abbbu bbabu bbabu babbu abbbu babbu abbbu ubbab bubab ubbab bubab bbuab bbuab ubabb buabb uabbb aubbb baubb abubb ubabb buabb uabbb aubbb baubb abubb bbaub bbaub babub abbub babub abbub
Note: these 'words' (valid or invalid) are all the permutations of the word bubba. These words are obtained by scrambling the letters in bubba.