yapon aypon ypaon pyaon apyon payon yaopn ayopn yoapn oyapn aoypn oaypn ypoan pyoan yopan oypan poyan opyan apoyn paoyn aopyn oapyn poayn opayn yapno aypno ypano pyano apyno payno yanpo aynpo ynapo nyapo anypo naypo ypnao pynao ynpao nypao pnyao npyao apnyo panyo anpyo napyo pnayo npayo yaonp ayonp yoanp oyanp aoynp oaynp yanop aynop ynaop nyaop anyop nayop yonap oynap ynoap nyoap onyap noyap aonyp oanyp anoyp naoyp onayp noayp ypona pyona yopna oypna poyna opyna ypnoa pynoa ynpoa nypoa pnyoa npyoa yonpa oynpa ynopa nyopa onypa noypa ponya opnya pnoya npoya onpya nopya apony paony aopny oapny poany opany apnoy panoy anpoy napoy pnaoy npaoy aonpy oanpy anopy naopy onapy noapy ponay opnay pnoay npoay onpay nopay
Note: these 'words' (valid or invalid) are all the permutations of the word yapon. These words are obtained by scrambling the letters in yapon.