using System;

public class CheckTmura

{

    static int[] check = new int[100];

    public static void init()

    {

        for(int i = 0; i < 100; i++) {

            check[i] = 1;

        }

    }

    public static int[] get_input()

    {

        Console.Write("Enter a tmura: ");

        string s = Console.ReadLine();

        string[] numbers = s.Split(' ');

        int[] u = Array.ConvertAll<string, int>(numbers, int.Parse);

        return u;

    }

    public static bool check_tmura(int[] u)

    {

        for(int i=0; i < u.Length; i++) {

            check[u[i]] = 0;

        }

        int count = 0;

        for(int i = 1; i <= u.Length; i++) {

            if(check[i] == 0)

                count++;

        }

        if(count == u.Length)

            return true;

        else

            return false;

    }       

    public static void Main()

    {

        while(true) {

            init();

            int[] u = get_input();

            if(u.Length == 0)

                continue;

            bool ken = check_tmura(u);

            if(ken)

                Console.WriteLine("It is a tmura (permutation)!!\n");

            else

                Console.WriteLine("NO!!\n");

        }

    }

}