# import pypyjit;pypyjit.set_param("max_unroll_recursion=-1")
import sys

# from bisect import *
# from collections import *
# from decimal import *  # PyPyだと遅い
# from heapq import *
# from itertools import *
# from math import gcd, lcm
# from random import *
# from string import *

# from atcoder.dsu import *
# from atcoder.segtree import *
# from more_itertools import *
# from sortedcontainers import *

# sys.setrecursionlimit(10**7)  # PyPyは呪文を付ける
# sys.set_int_max_str_digits(0)
INF = 1 << 61
MOD = 998244353
# MOD = 10**9 + 7
IS_DEBUG = "LOCAL_DEBUG" in sys.argv
File = sys.stdin


def debug(*args, **kwargs):
    if IS_DEBUG:
        print(*args, **kwargs)


def input():
    return File.readline().replace("\n", "")


# ///////////////////////////////////////////////////////////////////////////


for _ in range(int(input())):
    V, X, Fo, Fi, Q, R = map(int, input().split())
    p = Fi * R
    if Fo * Q == p:
        print("Safe")
    elif Fo * Q < p:
        print("Overflow")
    else:
        t = X - Fo * R + Fi * R
        if t > V:
            print("Overflow")
        else:
            print("Zero")