#include <bits/stdc++.h>
#ifdef _DEBUG
#include "debug.hpp"
#else
#define debug(...)
#endif
#define fastIO (cin.tie(0), cout.tie(0), ios::sync_with_stdio(false))
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define precise(i) fixed << setprecision(i)
using namespace std;

void solve() {
  int T;
  cin >> T;
  int pos = 0;
  for (int i = 0; i < T; i++) {
    int xi;
    cin >> xi;
    debug(pos, xi);
    if (abs(pos - xi) == 1) {
      pos = xi;
    } else {
      cout << "F" << '\n';
      return;
    }
  }
  cout << "T" << '\n';
}

void wrapper() {
  int loop;
  cin >> loop;
  rep(i, loop) {
    cout << "[TEST " << i + 1 << "]\n";
    solve();
    cout << "\n";
  }
}

int main() {
  fastIO;
#ifdef _DEBUG
  wrapper();
#else
  solve();
#endif
}