import sys, time, random
from collections import deque, Counter, defaultdict
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 61 - 1
mod = 998244353

def solve():
    v, x, vout, vin, q, r = mi()
    vin -= vout
    delta = vin * r - vout * (q - r)
    d1 = vin * r
    if x + d1 > v:
        print('Overflow')
    else:
        if delta > 0:
            print('Overflow')
        if delta < 0:
            print('Zero')
        if delta == 0:
            print('Safe')
    
    
    
    
for _ in range(ii()):
    solve()