n=int(input())
ax,ay=map(int,input().split())
bx,by=map(int,input().split())
cx,cy=map(int,input().split())
ans=[]
for dx,dy in (-1,0),(1,0),(0,1),(0,-1):
  nx,ny=cx+dx,cy+dy
  if 0<nx<=n>=ny>0:
    ans+=(nx,ny),
print(len(ans))
for t in ans:
  print(*t)