for _ in range(int(input())):
    v, x, fo, fi, q, r = map(int, input().split())
    if fi < fo:
        print('Zero')
    else:
        add = (fi - fo) * r
        sub = fo * (q - r)
        print('Overflow' if add > sub or x + add > v else 'Zero' if add < sub else 'Safe')