#include <stdio.h>

int solve(long long V, long long X, int Fo, int Fi, int Q, int R)
{
	long long Y = X;
	Y += (Fi - Fo) * R;
	if (Y > V) return 1;
	Y -= Fo * (Q - R);
	if (Y < X) return -1;
	else if (Y > X) return 1;
	else return 0;
}

int main()
{
	int T, Fo, Fi, Q, R, ans;
	long long V, X;
	scanf("%d", &T);
	while (T--) {
		scanf("%lld %lld %d %d %d %d", &V, &X, &Fo, &Fi, &Q, &R);
		ans = solve(V, X, Fo, Fi, Q, R);
		if (ans < 0) printf("Zero\n");
		else if (ans > 0) printf("Overflow\n");
		else printf("Safe\n");
	}
	fflush(stdout);
	return 0;
}