phpht hppht pphht pphht hppht phpht phhpt hphpt phhpt hphpt hhppt hhppt pphht pphht phpht hppht phpht hppht hphpt phhpt hhppt hhppt phhpt hphpt phpth hppth pphth pphth hppth phpth phtph hptph pthph tphph htpph thpph ppthh ppthh ptphh tpphh ptphh tpphh hptph phtph htpph thpph pthph tphph phhtp hphtp phhtp hphtp hhptp hhptp phthp hpthp pthhp tphhp htphp thphp phthp hpthp pthhp tphhp htphp thphp hhtpp hhtpp hthpp thhpp hthpp thhpp pphth pphth phpth hppth phpth hppth ppthh ppthh ptphh tpphh ptphh tpphh phtph hptph pthph tphph htpph thpph phtph hptph pthph tphph htpph thpph hphtp phhtp hhptp hhptp phhtp hphtp hpthp phthp htphp thphp pthhp tphhp hhtpp hhtpp hthpp thhpp hthpp thhpp phthp hpthp pthhp tphhp htphp thphp
Note: these 'words' (valid or invalid) are all the permutations of the word phpht. These words are obtained by scrambling the letters in phpht.