import heapq 
from heapq import heappop,heappush,heapify
from sys import stdin, setrecursionlimit
input = stdin.readline
readline = stdin.readline
N=int(input())
ax,ay=map(int, input().split())
bx,by=map(int, input().split())
cx,cy=map(int, input().split())

print(4)
print(cx+1,cy)
print(cx-1,cy)
print(cx,cy+1)
print(cx,cy-1)