using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Swap<T>(List<T> list, int index1, int index2)

    {

        if (index1 >= 0 && index1 < list.Count && index2 >= 0 && index2 < list.Count)

        {

            T temp = list[index1];

            list[index1] = list[index2];

            list[index2] = temp;

        }

    }

​

    public static void Main()

    {

        int n = int.Parse(Console.ReadLine());

        List<int> elements = new List<int>();

​

        for (int i = 0; i < n; i++)

        {

            int element = int.Parse(Console.ReadLine());

            elements.Add(element);

        }

​

        string[] swapCommand = Console.ReadLine().Split();

        int index1 = int.Parse(swapCommand[0]);

        int index2 = int.Parse(swapCommand[1]);

​

        Swap(elements, index1, index2);

​

        foreach (var element in elements)

        {

            string typeName = element.GetType().FullName;

            Console.WriteLine($"{typeName}: {element}");

        }

    }

}

​