#include <cstdio>
#include <cstdlib>
long long x, y, mx, my;
int n,ans;
bool ok;
int main() {
	freopen("loverfinding.in", "r", stdin);
	freopen("loverfinding.out", "w", stdout);
	int i;
	long long a, b;
	scanf("%d%lld%lld%lld%lld", &n, &x, &y, &mx, &my);
	ans = 0;
	for (i = 1; i <= n; i++) {
		scanf("%lld%lld", &a, &b);
		ans++;
		x += a;
		y += b;
		if (x == mx&&y == my) {
			ok = 1;
			break;
		}
	}
	if (ok == 1)
		printf("%d", ans);
	else
		printf("SingleDogMZX");
	fclose(stdin);
	fclose(stdout);
	return 0;
}