nijr injr njir jnir ijnr jinr nirj inrj nrij rnij irnj rinj njri jnri nrji rnji jrni rjni ijrn jirn irjn rijn jrin rjin
Note: these 'words' (valid or invalid) are all the permutations of the word nijr. These words are obtained by scrambling the letters in nijr.