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

ans = []
d = ((1, 0), (-1, 0), (0, 1), (0, -1))
for dy, dx in d:
    ny = cy + dy
    nx = cx + dx
    if not (1 <= ny <= N and 1 <= nx <= N):
        continue
    if (ny, nx) == (by, bx):
        continue
    if (ny, nx) == (ay, ax):
        continue
    ans.append((nx, ny))
print(len(ans))
for i, j in ans:
    print(i, j)