#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 precise(i) fixed << setprecision(i)
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;

void solve() {
  string s;
  cin >> s;
  int arr[3]{0, 0, 0};
  for(const auto ch : s) {
    if(ch == 't') arr[0] += 1;
    else if(ch == 'r') arr[1] += 1;
    else if(ch == 'e') arr[2] += 1;
  }

  int maxv = max(arr[0], 0);
  maxv = min(maxv, arr[1]);
  maxv = min(maxv, arr[2] / 2);

  cout << maxv << '\n';
}

void wrapper() {
  int loop;
  cin >> loop;
  for (int i = 0; i < loop; i++) {
    auto start = chrono::steady_clock::now();
    cout << "[TEST " << i + 1 << "]\n";
    solve();
    auto end = chrono::steady_clock::now();
    chrono::duration<double> elapsed = end - start;
    cout << "[elapsed : " << elapsed.count() << "]" << '\n';
  }
}

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