bundh ubndh bnudh nbudh unbdh nubdh budnh ubdnh bdunh dbunh udbnh dubnh bnduh nbduh bdnuh dbnuh ndbuh dnbuh undbh nudbh udnbh dunbh ndubh dnubh bunhd ubnhd bnuhd nbuhd unbhd nubhd buhnd ubhnd bhund hbund uhbnd hubnd bnhud nbhud bhnud hbnud nhbud hnbud unhbd nuhbd uhnbd hunbd nhubd hnubd budhn ubdhn bduhn dbuhn udbhn dubhn buhdn ubhdn bhudn hbudn uhbdn hubdn bdhun dbhun bhdun hbdun dhbun hdbun udhbn duhbn uhdbn hudbn dhubn hdubn bndhu nbdhu bdnhu dbnhu ndbhu dnbhu bnhdu nbhdu bhndu hbndu nhbdu hnbdu bdhnu dbhnu bhdnu hbdnu dhbnu hdbnu ndhbu dnhbu nhdbu hndbu dhnbu hdnbu undhb nudhb udnhb dunhb nduhb dnuhb unhdb nuhdb uhndb hundb nhudb hnudb udhnb duhnb uhdnb hudnb dhunb hdunb ndhub dnhub nhdub hndub dhnub hdnub
Note: these 'words' (valid or invalid) are all the permutations of the word bundh. These words are obtained by scrambling the letters in bundh.