chph hcph cphh pchh hpch phch chhp hchp chhp hchp hhcp hhcp cphh pchh chph hcph phch hpch hphc phhc hhpc hhpc phhc hphc
Note: these 'words' (valid or invalid) are all the permutations of the word chph. These words are obtained by scrambling the letters in chph.