namespace Task_1
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    public class Program
    {
        public static void Main()
        {
            string numbersFromConsole = Console.ReadLine(); //1.read numbers from console

            var arrayOfNumbers = numbersFromConsole // 2.split the numbers by space and parse them to array
                .Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
                .Select(int.Parse)
                .ToArray();

            Array.Sort(arrayOfNumbers); //3. sorting the array

            //TODO:
            // last answer!
            for (int i = 0; i < arrayOfNumbers.Length - 1; i++)
            {
                if (arrayOfNumbers[i + 1] - arrayOfNumbers[i] == 1)
                {
                    continue;
                }

                else
                {
                    Console.WriteLine("Not consecutive numbers");
                    return;
                }


            }
        }
    }
}