#include <bits/stdc++.h>
using namespace std;
const int N = 110;
string s[N];
int main() {
  // 从文本文件中获取输入
#ifndef ONLINE_JUDGE
  freopen("4.in", "r", stdin);
#endif
  int T;
  cin >> T;
  while (T--) {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++)
      cin >> s[i];
    // 对字符串进行排序
    sort(s + 1, s + n + 1);
    // 拼接成一个长的字符串
    string t = "";
    for (int i = 1; i <= n; i++)
      t = t + s[i];

    bool isHeFa = true;
    for (int i = 1; i < t.size(); i++) {
      if (t[i] < t[i - 1]) {
        isHeFa = false;
        break;
      }
    }
    cout << isHeFa << endl;
  }
  return 0;
}