using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var a = NList;
        var b = NList;
        var c = NList;
        WriteLine(4);
        WriteLine($"{c[0] - 1} {c[1]}");
        WriteLine($"{c[0] + 1} {c[1]}");
        WriteLine($"{c[0]} {c[1] - 1}");
        WriteLine($"{c[0]} {c[1] + 1}");
    }
}