def solve():
	v, x, fo, fi, q, r = [int(y) for y in input().split()]
	fd = fi - fo
	if x + fd * r > v:
		return "Overflow"
	elif x + fi * r - fo * q <= 0:
		return "Zero"
	elif fd > 0:
		return "Overflow"
	elif fd < 0:
		return "Zero"
	else:
		return "Safe"
	
t = int(input())
for _ in range(t):
	print(solve())