N = int(input())
a_x, a_y = map(int, input().split())
b_x, b_y = map(int, input().split())
c_x, c_y = map(int, input().split())

print(4)
print(c_x - 1, c_y)
print(c_x, c_y - 1)
print(c_x + 1, c_y)
print(c_x, c_y + 1)