using System;

public class Hello
{
    static void Main()
    {
        for (int i = 0; i < 3; i++) Console.ReadLine();
        string[] line = Console.ReadLine().Trim().Split(' ');
        var x = int.Parse(line[0]);
        var y = int.Parse(line[1]);
        getAns(x, y);
    }
    static void getAns(int x, int y)
    {
        Console.WriteLine(4);
        Console.WriteLine("{0} {1}", x - 1, y);
        Console.WriteLine("{0} {1}", x + 1, y);
        Console.WriteLine("{0} {1}", x, y - 1);
        Console.WriteLine("{0} {1}", x, y + 1);
    }
}