T = int(input())
for _ in range(T):
    V,X,F0,Fi,Q,R = map(int, input().split())
    step1 = Fi*R-F0*R
    step2 = F0*(Q-R)
    if X+step1>V:
        print("Overflow")
        continue
    if step1-step2>0:
        print("Overflow")
    elif step1-step2==0:
        print("Safe")
    else:
        print("Zero")