#include <iostream>
using namespace std;

void solve(int x, int Vx, int y, int Vy, int z) {
	cout << x << " " << y << endl;
	if (x == z || y == z)
		return;
		
	if (y == 0)
		y = Vy;
	else if (x == Vx)
		x = 0;
	else if (y > 0 && x < Vx) {
		int k = min(y, Vx - x);
		x = x + k;
		y = y - k;
	}
	
	solve(x, Vx, y, Vy, z);
}


int main() {
	
	solve(0, 5, 0, 7, 4);
	return 0;
}