for _ in range(int(input())):
    V,X,Fo,Fi,Q,R = map(int,input().split())
    inc = (Fi - Fo) * R
    dec = Fo * (Q - R)
    if inc < 0:
        print("Zero")
    elif inc > dec:
        print("Overflow")
    elif X + inc > V:
        print("Overflow")
    elif inc == dec:
        print("Safe")
    else:
        print("Zero")