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