/* -*- coding: utf-8 -*-
 *
 * 2622.cc:  No.2622 Dam - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    ll v, x;
    int fo, fi, q, r;
    scanf("%lld%lld%d%d%d%d", &v, &x, &fo, &fi, &q, &r);

    ll s = x;
    s += (ll)(fi - fo) * r;
    if (s > v) { puts("Overflow"); continue; }
    s -= (ll)fo * (q - r);
    if (s <= 0) { puts("Zero"); continue; }

    if (s > x) puts("Overflow");
    else if (s < x) puts("Zero");
    else puts("Safe");
  }

  return 0;
}