import os, sys
if os.path.exists("input.txt"):
  sys.stdin = open('input.txt', 'r')

N = int(input())
Ax, Ay = map(int, input().split())
Bx, By = map(int, input().split())
Cx, Cy = map(int, input().split())

def is_ok(i, j):
  return i > 0 and i <= N and j > 0 and j <= N

walls = []
dirs = [0, 1, 0, -1, 0]
for k in range(4):
  nx, ny = dirs[k] + Cx, dirs[k + 1] + Cy
  if is_ok(nx, ny):
    walls.append([nx, ny])

print(len(walls))
for wall in walls:
  print(*wall)