n = int(input())
ax, ay = map(int, input().split())
bx, by = map(int, input().split())
cx, cy = map(int, input().split())

ans = []
di = [0, 1, 0, -1]
dj = [1, 0, -1, 0]
print(4)
for k in range(4):
    print(cx + di[k], cy + dj[k])