for _ in range(int(input())):
    v, x, fo, fi, q, r = map(int, input().split())
    curr = x + (fi - fo) * r
    if curr > v:
        print("Overflow")
        continue
    elif curr <= 0:
        print("Zero")
        continue
    curr -= fo * (q - r)
    if curr <= 0:
        print("Zero")
        continue
    dif = curr - x
    if dif > 0:
        print("Overflow")
    elif dif < 0:
        print("Zero")
    else:
        print("Safe")