#include <bits/stdc++.h>

using namespace std;

int main() {
  string s;
  cin >> s;
  int n = s.size();

  string t = "";
  for (int i = 0; i < n; ++i) {
    if (s[i] != '-') t += s[i];
  }
  int ans = 0;
  for (int i = 0; i < t.size() - 2; ++i) {
    if (t[i] == 'm' && t[i + 1] == 'i' && t[i + 2] == 'n') ans++;
  }
  cout << ans << '\n';
  return 0;
  
}