static void Main(string[] args)
{
int n = int.Parse(Console.ReadLine());
BoxStore <string> boxStore = new BoxStore <string>();
for (int i = 0; i < n; i++)
{
Box <string> box = new Box <string>(Console.ReadLine());
boxStore.AddBox(box);
}
int[] index = Console.ReadLine().Split(" ", StringSplitOptions.RemoveEmptyEntries)
.Select(int.Parse).ToArray();
boxStore.SwapBoxes(index[0], index[1]);
Console.WriteLine(boxStore.ToString());
}
static void Main(string[] args)
{
BoxStore <string> lst = new BoxStore <string>();
int n = int.Parse(Console.ReadLine());
for (int i = 0; i < n; i++)
{
string input = Console.ReadLine();
Box <string> item = new Box <string>(input);
lst.Add(item);
}
var arr = Console.ReadLine().Split().Select(int.Parse).ToArray();
int index1 = arr[0];
int index2 = arr[1];
lst.SwapMethod(index1, index2);
Console.WriteLine(lst.ToString());
}