phib hpib pihb iphb hipb ihpb phbi hpbi pbhi bphi hbpi bhpi pibh ipbh pbih bpih ibph biph hibp ihbp hbip bhip ibhp bihp
Note: these 'words' (valid or invalid) are all the permutations of the word phib. These words are obtained by scrambling the letters in phib.