import sys
sys.setrecursionlimit(5*10**5)
input = sys.stdin.readline
from collections import defaultdict, deque, Counter
from heapq import heappop, heappush
from bisect import bisect_left, bisect_right
from math import gcd

def sol():
    v,x,fo,fi,q,r  = map(int,input().split())
    if r*(fi-fo) + x > v:
        print("Overflow")
        return
    tot = (r)*fi - fo*q
    if tot == 0:
        print("Safe")
    elif tot < 0:
        print("Zero")
    else:
        print("Overflow")
    return 


T = int(input())
for i in range(T):
    sol()