N = int(input())
for i in range(N):
	V, X, Fo, Fi, Q, R = map(int, input().split())
	C = Fi * R - Fo * Q
	if C > 0 and C * 10 ** 100 > V - X:
		print("Overflow")
	elif C < 0 and C * 10 ** 100 < X:
		print("Zero")
	else:
		print("Safe")