def solve():
    v, x, fo, fi, q, r = map(int, input().split())

    y = x
    y += r * (fi - fo)
    if y > v:
        print("Overflow")
        return
    y -= fo * (q - r)
    if y > x:
        print("Overflow")
    elif y == x:
        print("Safe")
    else:
        print("Zero")


for _ in range(int(input())):
    solve()