bough obugh buogh ubogh oubgh uobgh boguh obguh bgouh gbouh ogbuh gobuh bugoh ubgoh bguoh gbuoh ugboh guboh ougbh uogbh ogubh goubh ugobh guobh bouhg obuhg buohg ubohg oubhg uobhg bohug obhug bhoug hboug ohbug hobug buhog ubhog bhuog hbuog uhbog hubog ouhbg uohbg ohubg houbg uhobg huobg boghu obghu bgohu gbohu ogbhu gobhu bohgu obhgu bhogu hbogu ohbgu hobgu bghou gbhou bhgou hbgou ghbou hgbou oghbu gohbu ohgbu hogbu ghobu hgobu bugho ubgho bguho gbuho ugbho gubho buhgo ubhgo bhugo hbugo uhbgo hubgo bghuo gbhuo bhguo hbguo ghbuo hgbuo ughbo guhbo uhgbo hugbo ghubo hgubo oughb uoghb oguhb gouhb ugohb guohb ouhgb uohgb ohugb hougb uhogb huogb oghub gohub ohgub hogub ghoub hgoub ughob guhob uhgob hugob ghuob hguob
Note: these 'words' (valid or invalid) are all the permutations of the word bough. These words are obtained by scrambling the letters in bough.