#誤解法３
I,R,O=input,range,print
N=int(I())
A=[list(map(int,I().split()))for i in R(3)]
x,y=A[2]
if x*2+1<=N:
	for i in R(1,x):
		if [i,y+1]in A[:2]or[i,y-1]in A[:2]:break
	else:
		O(x*2+1)
		for i in R(1,x+1):O(i,y+1);O(i,y-1)
		exit(O(x+1,y))
if (N-x+1)*2+1<=N:
	for i in R(x,N+1):
		if [i,y+1]in A[:2]or[i,y-1]in A[:2]:break
	else:
		O((N-x+1)*2+1)
		for i in R(x,N+1):O(i,y+1);O(i,y-1)
		exit(O(x-1,y))
if y*2+1<=N:
	for j in R(1,y):
		if [x+1,j]in A[:2]or[x-1,j]in A[:2]:break
	else:
		O(y*2+1)
		for j in R(1,y+1):O(x+1,j);O(x-1,j)
		exit(O(x,y+1))
if (N-y+1)*2+1<=N:
	for j in R(y,N+1):
		if [x+1,j]in A[:2]or[x-1,j]in A[:2]:break
	else:
		O((N-y+1)*2+1)
		for j in R(y,N+1):O(x+1,j);O(x-1,j)
		exit(O(x,y-1))
O("WA")