buchu ubchu bcuhu cbuhu ucbhu cubhu buhcu ubhcu bhucu hbucu uhbcu hubcu bchuu cbhuu bhcuu hbcuu chbuu hcbuu uchbu cuhbu uhcbu hucbu chubu hcubu bucuh ubcuh bcuuh cbuuh ucbuh cubuh buuch ubuch buuch ubuch uubch uubch bcuuh cbuuh bucuh ubcuh cubuh ucbuh ucubh cuubh uucbh uucbh cuubh ucubh buhuc ubhuc bhuuc hbuuc uhbuc hubuc buuhc ubuhc buuhc ubuhc uubhc uubhc bhuuc hbuuc buhuc ubhuc hubuc uhbuc uhubc huubc uuhbc uuhbc huubc uhubc bchuu cbhuu bhcuu hbcuu chbuu hcbuu bcuhu cbuhu buchu ubchu cubhu ucbhu bhucu hbucu buhcu ubhcu hubcu uhbcu chubu hcubu cuhbu uchbu hucbu uhcbu uchub cuhub uhcub hucub chuub hcuub ucuhb cuuhb uuchb uuchb cuuhb ucuhb uhucb huucb uuhcb uuhcb huucb uhucb chuub hcuub cuhub uchub hucub uhcub
Note: these 'words' (valid or invalid) are all the permutations of the word buchu. These words are obtained by scrambling the letters in buchu.