dauby aduby duaby udaby audby uadby dabuy adbuy dbauy bdauy abduy baduy dubay udbay dbuay bduay ubday buday aubdy uabdy abudy baudy ubady buady dauyb aduyb duayb udayb audyb uadyb dayub adyub dyaub ydaub aydub yadub duyab udyab dyuab yduab uydab yudab auydb uaydb ayudb yaudb uyadb yuadb dabyu adbyu dbayu bdayu abdyu badyu daybu adybu dyabu ydabu aydbu yadbu dbyau bdyau dybau ydbau bydau ybdau abydu baydu aybdu yabdu byadu ybadu dubya udbya dbuya bduya ubdya budya duyba udyba dyuba yduba uydba yudba dbyua bdyua dybua ydbua bydua ybdua ubyda buyda uybda yubda byuda ybuda aubyd uabyd abuyd bauyd ubayd buayd auybd uaybd ayubd yaubd uyabd yuabd abyud bayud aybud yabud byaud ybaud ubyad buyad uybad yubad byuad ybuad
Note: these 'words' (valid or invalid) are all the permutations of the word dauby. These words are obtained by scrambling the letters in dauby.