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

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