t = int(input())
while t:
    t -= 1

    v, x, f0, f1, q, r = map(int, input().split())
    if f1 * r > q * f0:
        print("Overflow")
    elif f1 * r < q * f0:
        print("Zero")
    else:
        if (f1 - f0) * r + x > v:
            print("Overflow")
        else:
            print("Safe")