import collections,sys,math,functools,operator,itertools,bisect,heapq,decimal,string,time,random
#sys.setrecursionlimit(10**9)
#sys.set_int_max_str_digits(0)
input = sys.stdin.readline
#n = int(input())
#alist = list(map(int,input().split()))
#alist = []
#s = input()
for i in range(int(input())):
    v,x,fo,fi,q,r = map(int,input().split())
    now = x
    y = r * (fi-fo)
    now += y
    if now <= 0:
        print('Zero')
        continue
    if now > v:
        print('Overflow')
        continue
    y = (q-r) * (0-fo)
    now += y
    if now <= 0:
        print('Zero')
        continue
    if now > v:
        print('Overflow')
        continue
    if x-now > 0:
        print('Zero')
    elif x-now < 0:
        print('Overflow')
    else:
        print('Safe')