feebo efebo feebo efebo eefbo eefbo febeo efbeo fbeeo bfeeo ebfeo befeo febeo efbeo fbeeo bfeeo ebfeo befeo eebfo eebfo ebefo beefo ebefo beefo feeob efeob feeob efeob eefob eefob feoeb efoeb foeeb ofeeb eofeb oefeb feoeb efoeb foeeb ofeeb eofeb oefeb eeofb eeofb eoefb oeefb eoefb oeefb feboe efboe fbeoe bfeoe ebfoe befoe feobe efobe foebe ofebe eofbe oefbe fboee bfoee fobee ofbee bofee obfee ebofe beofe eobfe oebfe boefe obefe feboe efboe fbeoe bfeoe ebfoe befoe feobe efobe foebe ofebe eofbe oefbe fboee bfoee fobee ofbee bofee obfee ebofe beofe eobfe oebfe boefe obefe eebof eebof ebeof beeof ebeof beeof eeobf eeobf eoebf oeebf eoebf oeebf eboef beoef eobef oebef boeef obeef eboef beoef eobef oebef boeef obeef
Note: these 'words' (valid or invalid) are all the permutations of the word feebo. These words are obtained by scrambling the letters in feebo.