N = int(input())
Ax,Ay = map(int, input().split())
Bx,By = map(int, input().split())
Cx,Cy = map(int, input().split())
ANS = []
if Cx>1:
    ANS.append([Cx-1,Cy])
if Cx<N:
    ANS.append([Cx+1,Cy])
if Cy>1:
    ANS.append([Cx,Cy-1])
if Cy<N:
    ANS.append([Cx,Cy+1])
print(len(ANS))
for ans in ANS:
    print(*ans)