#!/usr/bin/python3

import collections
import sys

try:
	N = int(input())

	start = tuple(int(x) for x in input().split())
	if len(start) != 2 or not (0 <= start[0] < N and 0 <= start[1] < N):
		raise ValueError
	end = tuple(int(x) for x in input().split())
	if len(end) != 2 or not (0 <= end[0] < N and 0 <= end[1] < N):
		raise ValueError

	moves = int(input())
	moves = [tuple(int(x) for x in input().split()) for _ in range(moves)]

	if any(map(lambda x: len(x) != 2, moves)):
		raise ValueError;

except ValueError:
	print("Vstup ma spatny format.",file=sys.stderr)
	exit(1)
except EOFError:
	print("Vstup predcasne skoncil.",file=sys.stderr)
	exit(1)

board = {start: start}
queue = collections.deque([start])

while len(queue) > 0:
	x0, y0 = pos0 = queue.popleft()
	for x, y in moves:
		x, y = pos = x0+x, y0+y
		if not (0 <= x < N and 0 <= y < N):
			continue
		if pos not in board:
			board[pos] = pos0
			queue.append(pos)
		if pos == end:
			break
	else:
		continue
	break

if end not in board:
	print("Cil je nedosazitelny.",file=sys.stderr)
	exit(1)

prev = board[pos]
backtrack = []
while prev != start:
	backtrack.append(prev)
	prev = board[prev]

print(len(backtrack)+1)
for i in reversed(backtrack):
	print(*i)