T = int(input())
assert 1 <= T <= 1000
for _ in range(T):
    V, X, Fo, Fi, Q, R = map(int, input().split())
    assert 1 <= X <= V <= 10 ** 18
    assert 1 <= Fo <= 10 ** 9
    assert 1 <= Fi <= 10 ** 9
    assert 1 <= R < Q <= 10 ** 9

    if X + R * (Fi - Fo) > V:
        print("Overflow")
    else:
        if R * Fi - Q * Fo > 0:
            print("Overflow")
        elif R * Fi - Q * Fo < 0:
            print("Zero")
        else:
            print("Safe")