def solve():
    V, X, F_out, F_in, Q, R = map(int, input().split())
    F_sunny, F_rainy = - F_out, F_in - F_out
    
    
    if X + R * F_rainy > V:
        print("OverFlow")
        return
    
    diff = R * F_rainy + (Q - R) * F_sunny
    if diff < 0:
        print("Zero")
    elif diff > 0:
        print("Overflow")
    else:
        print("Safe")

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