#include <iostream>
#include <string>
using namespace std;
typedef long long ll;
#define int ll

signed main(void) {
  string m;
  int s, Count = 0;

  cin >> m;
  s = m.size();
  for (int i = 0; i < s; i++) {
    if(m[i] == 'm' && m[i+1] == 'i') {
      i+=2;
      while(m[i] != 'n') {
        if(i >= s) break;
        i++;
      }
      if(i < s) Count++;
    }
  }
  cout << Count << endl;
  return 0;

}