#include <bits/stdc++.h>

using namespace std;

int main(void) {
  string s;
  cin >> s;

  string t = "";
  for (int i = 0; i < s.size(); i++) {
    if (i > 0 && s[i] == '-' && s[i - 1] == '-') continue;
    t += s[i];
  }

  int ans = 0;
  for (int i = 0; i < t.size(); i++) {
    ans += (t.substr(i, 3) == "min" || t.substr(i, 4) == "mi-n");
  }

  cout << ans << endl;

  return 0;
}