import sys
input = sys.stdin.readline

T=int(input())
for tests in range(T):
    V,X,F0,F1,Q,R=map(int,input().split())

    if X+(F1-F0)*R>V:
        print("Overflow")
        continue

    t=X-F0*Q+F1*R

    if t<=0:
        print("Zero")
        continue

    if t>X:
        print("Overflow")
    elif t<X:
        print("Zero")
    else:
        print("Safe")