bubbe ubbbe bbube bbube ubbbe bubbe bubbe ubbbe bbube bbube ubbbe bubbe bbbue bbbue bbbue bbbue bbbue bbbue ubbbe bubbe ubbbe bubbe bbube bbube bubeb ubbeb bbueb bbueb ubbeb bubeb buebb ubebb beubb ebubb uebbb eubbb bbeub bbeub bebub ebbub bebub ebbub ubebb buebb uebbb eubbb beubb ebubb bubeb ubbeb bbueb bbueb ubbeb bubeb buebb ubebb beubb ebubb uebbb eubbb bbeub bbeub bebub ebbub bebub ebbub ubebb buebb uebbb eubbb beubb ebubb bbbeu bbbeu bbbeu bbbeu bbbeu bbbeu bbebu bbebu bebbu ebbbu bebbu ebbbu bbebu bbebu bebbu ebbbu bebbu ebbbu bbebu bbebu bebbu ebbbu bebbu ebbbu ubbeb bubeb ubbeb bubeb bbueb bbueb ubebb buebb uebbb eubbb beubb ebubb ubebb buebb uebbb eubbb beubb ebubb bbeub bbeub bebub ebbub bebub ebbub
Note: these 'words' (valid or invalid) are all the permutations of the word bubbe. These words are obtained by scrambling the letters in bubbe.