import sys
input=sys.stdin.readline
T=int(input())
for _ in range(T):
    V,X,Fo,Fi,Q,R=map(int,input().split())
    if Fi<Fo:
        print('Zero')
        continue
    next=-Fo*Q+Fi*R
    first=X-Fo*R+Fi*R
    if first>V:
        print('Overflow')
        continue
    if next>0:
        print('Overflow')
    elif next==0:
        print('Safe')
    else:
        print('Zero')