boyau obyau byoau yboau oybau yobau boayu obayu baoyu aboyu oabyu aobyu byaou ybaou bayou abyou yabou aybou oyabu yoabu oaybu aoybu yaobu ayobu boyua obyua byoua yboua oybua yobua bouya obuya buoya uboya oubya uobya byuoa ybuoa buyoa ubyoa yuboa uyboa oyuba youba ouyba uoyba yuoba uyoba boauy obauy baouy abouy oabuy aobuy bouay obuay buoay uboay oubay uobay bauoy abuoy buaoy ubaoy auboy uaboy oauby aouby ouaby uoaby auoby uaoby byauo ybauo bayuo abyuo yabuo aybuo byuao ybuao buyao ubyao yubao uybao bauyo abuyo buayo ubayo aubyo uabyo yaubo ayubo yuabo uyabo auybo uaybo oyaub yoaub oayub aoyub yaoub ayoub oyuab youab ouyab uoyab yuoab uyoab oauyb aouyb ouayb uoayb auoyb uaoyb yauob ayuob yuaob uyaob auyob uayob
Note: these 'words' (valid or invalid) are all the permutations of the word boyau. These words are obtained by scrambling the letters in boyau.