def solve():
	V, X, Fo, Fi, Q, R = map(int, input().split())
	if X + (Fi - Fo) * R > V or Fi * R - Fo * Q > 0:
		return 'Overflow'
	if Fi * R - Fo * Q < 0:
		return 'Zero'
	return 'Safe'

T = int(input())
for i in range(T):
	print(solve())