#include <bits/stdc++.h>
using namespace std;

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