import math
import sys


def input():
    return sys.stdin.readline().strip()


def main():
    input()
    input()
    input()
    cx,cy=map(int,input().split())
    print(8)
    for i in range(-1, 2):
        for j in range(-1, 2):
            if i != 0 or j != 0:
                print(cx+i,cy+j)


if __name__ == "__main__":
    main()