using System;

public class Program

{

    public static void Main()

    {

        Random rnd = new Random();

        int[] ints = new int[10];

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

            ints[i] = rnd.Next(1, 20);

        }

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

                    Console.WriteLine((i + 1)  + ":" + ints[i]);

        }

        Console.WriteLine("Vilket nummer vill du byta ut?");

        string indexs = Console.ReadLine();

        int index = Convert.ToInt32(indexs) - 1;

        Console.WriteLine("Vad ska det bli??");

        string vals = Console.ReadLine();

        int val = Convert.ToInt32(vals);

        ints[index] = val;

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

                    Console.WriteLine((i + 1)  + ":" + ints[i]);

        }

    }

}