#include <iostream>
#include <string>
using namespace std;

int main() {
  string s;
  cin >> s;
  int ans = 0;
  for (int i = 0; i < s.size() - 2; i++) {
    if (s[i] == 'm' && s[i + 1] == 'i') {
      for (int j = i + 2; j < s.size(); j++) {
        if (s[j] == '-') continue;
        else if (s[j] == 'n') {
          ans++;
          break;
        } else break;
      }
    }
  }
  cout << ans << endl;
  return 0;
}