lound olund luond ulond oulnd uolnd lonud olnud lnoud nloud onlud nolud lunod ulnod lnuod nluod unlod nulod ounld uonld onuld nould unold nuold loudn oludn luodn ulodn ouldn uoldn lodun oldun ldoun dloun odlun dolun ludon uldon lduon dluon udlon dulon oudln uodln oduln douln udoln duoln londu olndu lnodu nlodu onldu noldu lodnu oldnu ldonu dlonu odlnu dolnu lndou nldou ldnou dlnou ndlou dnlou ondlu nodlu odnlu donlu ndolu dnolu lundo ulndo lnudo nludo unldo nuldo ludno uldno lduno dluno udlno dulno lnduo nlduo ldnuo dlnuo ndluo dnluo undlo nudlo udnlo dunlo ndulo dnulo oundl uondl onudl noudl unodl nuodl oudnl uodnl odunl dounl udonl duonl ondul nodul odnul donul ndoul dnoul undol nudol udnol dunol nduol dnuol
Note: these 'words' (valid or invalid) are all the permutations of the word lound. These words are obtained by scrambling the letters in lound.