Permutations For NIPOI

Here are all the permutations for the letters NIPOI.

nipo niop npio npio noip noip nipo niop inpo inop ipno ipon ionp iopn pnio pnio pino pion poin poin pino pion onip onip oinp oipn opin opin oinp oipn inpo inop ipno ipon ionp iopn