T = int(input())
for _ in range(T):
    V, X, Fo, Fi, Q, R = map(int, input().split())
    t = 0
    while t <= 10**100:
        if t % Q < R:
            dt = min((V - X)/Fi, R - t % Q, X/Fo)
        else:
            dt = min((V - X)/Fi, Q - t % Q, X/Fo)
        X += (Fi - Fo) * dt
        t += dt
        if X > V:
            print("Overflow")
            break
        elif X <= 0:
            print("Zero")
            break
    else:
        print("Safe")