t = int(input())

for i in range(t):
    v, x, f0, f1, q, r = map(int, input().split())
    if x + (f1 - f0) * r > v:
        print("Overflow")
    else:
        if f1 * r - f0 * q > 0:
            print("Overflow")
        elif f1 * r - f0 * q < 0:
            print("Zero")
        else:
            print("Safe")