{
class Program
{
static void Main(string[] args)
{
int a =int.Parse(Console.ReadLine());
int b =int.Parse(Console.ReadLine());
Swap(ref a,ref b);
Console.WriteLine(a);
Console.WriteLine(b);
}
public static void Swap(ref int a,ref int b)
{
int temp;
temp = a;
a = b;
b = temp;
}
}
}
```