bukes ubkes bkues kbues ukbes kubes bueks ubeks beuks ebuks uebks eubks bkeus kbeus bekus ebkus kebus ekbus ukebs kuebs uekbs eukbs keubs ekubs bukse ubkse bkuse kbuse ukbse kubse buske ubske bsuke sbuke usbke subke bksue kbsue bskue sbkue ksbue skbue uksbe kusbe uskbe sukbe ksube skube buesk ubesk beusk ebusk uebsk eubsk busek ubsek bsuek sbuek usbek subek besuk ebsuk bseuk sbeuk esbuk sebuk uesbk eusbk usebk suebk esubk seubk bkesu kbesu beksu ebksu kebsu ekbsu bkseu kbseu bskeu sbkeu ksbeu skbeu besku ebsku bseku sbeku esbku sebku kesbu eksbu ksebu skebu eskbu sekbu ukesb kuesb ueksb euksb keusb ekusb ukseb kuseb uskeb sukeb ksueb skueb ueskb euskb usekb suekb esukb seukb kesub eksub kseub skeub eskub sekub
Note: these 'words' (valid or invalid) are all the permutations of the word bukes. These words are obtained by scrambling the letters in bukes.