ubigo buigo uibgo iubgo biugo ibugo ubgio bugio ugbio gubio bguio gbuio uigbo iugbo ugibo guibo igubo giubo biguo ibguo bgiuo gbiuo igbuo gibuo ubiog buiog uibog iubog biuog ibuog uboig buoig uobig oubig bouig obuig uiobg iuobg uoibg ouibg ioubg oiubg bioug iboug boiug obiug iobug oibug ubgoi bugoi ugboi guboi bguoi gbuoi ubogi buogi uobgi oubgi bougi obugi ugobi guobi uogbi ougbi goubi ogubi bgoui gboui bogui obgui gobui ogbui uigob iugob ugiob guiob iguob giuob uiogb iuogb uoigb ouigb iougb oiugb ugoib guoib uogib ougib gouib oguib igoub gioub iogub oigub goiub ogiub bigou ibgou bgiou gbiou igbou gibou biogu ibogu boigu obigu iobgu oibgu bgoiu gboiu bogiu obgiu gobiu ogbiu igobu giobu iogbu oigbu goibu ogibu
Note: these 'words' (valid or invalid) are all the permutations of the word ubigo. These words are obtained by scrambling the letters in ubigo.