import sys

inf = float("inf")
# sys.setrecursionlimit(10**6)
input = lambda: sys.stdin.readline().rstrip("\r\n")

print = lambda *args, end="\n", sep=" ": sys.stdout.write(
    sep.join(map(str, args)) + end
)


def II():
    return int(input())


def MII(b=0):
    return map(lambda x: int(x) - b, input().split())


def LII(b=0):
    return list(MII(b))


def dam_overflow_or_zero(V, X, Fo, Fi, Q, R):
    # R: fi-fo
    # Q-R: -fo
    a = (Fi - Fo) * R
    b = -Fo * (Q - R)
    if X + a > V:
        return "Overflow"
    if X + a <= 0:
        return "Zero"
    if X + a + b > V:
        return "Overflow"
    if X + a + b <= 0:
        return "Zero"
    if a + b > 0:
        return "Overflow"
    if a + b < 0:
        return "Zero"
    return "Safe"


# 读取测试用例数量
T = int(input())

for _ in range(T):
    V, X, Fo, Fi, Q, R = map(int, input().split())
    result = dam_overflow_or_zero(V, X, Fo, Fi, Q, R)
    print(result)