potto optto ptoto tpoto otpto topto potto optto ptoto tpoto otpto topto pttoo tptoo pttoo tptoo ttpoo ttpoo ottpo totpo ottpo totpo ttopo ttopo potot optot ptoot tpoot otpot topot poott opott poott opott ooptt ooptt ptoot tpoot potot optot topot otpot otopt toopt ootpt ootpt toopt otopt potot optot ptoot tpoot otpot topot poott opott poott opott ooptt ooptt ptoot tpoot potot optot topot otpot otopt toopt ootpt ootpt toopt otopt pttoo tptoo pttoo tptoo ttpoo ttpoo ptoto tpoto potto optto topto otpto ptoto tpoto potto optto topto otpto ttopo ttopo totpo ottpo totpo ottpo ottop totop ottop totop ttoop ttoop ototp tootp oottp oottp tootp ototp ototp tootp oottp oottp tootp ototp ttoop ttoop totop ottop totop ottop
Note: these 'words' (valid or invalid) are all the permutations of the word potto. These words are obtained by scrambling the letters in potto.