T = int(input())
for _ in range(T):
    V,X,FO,FI,Q,R = map(int,input().split())
    if R*(FI-FO)+X>V:
        print('Overflow')
    elif R*FI+X-Q*FO<=0:
        print('Zero')
    elif R*FI==Q*FO:
        print('Safe')
    elif R*FI<Q*FO:
        print('Zero')
    else:
        print('Overflow')