T = int(input())
for _ in range(T):
    V,X,F0,Fi,Q,R = map(int,input().split())

    ans = "Safe"
    if X + R*Fi - R*F0 > V:
        ans = "Overflow"
    else:
        P = R*Fi - Q*F0
        if P > 0:
            ans = "Overflow"
        if P < 0:
            ans = "Zero"

    print(ans)