#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdint.h>
using namespace std;

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 
#define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) 

#include <iomanip>

int main()
{

  CIN( string , S );
  const uint& size = S.size();
  const string m = "m";
  const string i = "i";
  const string h = "-";
  const string n = "n";
  ll answer = 0;
  ll num = -1;

  for( uint j = 0 ; j < size ; j++ ){

    const string c = S.substr( j , 1 );
    
    if( c == m ){

      num = 0;

    } else if( c == i ){

      if( num == 0 ){

	num = 1;

      } else {

	num = -1;

      }

    } else if( c == h ){

      if( num != 1 ){

	num = -1;

      }
      
    } else if( c == n ){

      if( num == 1 ){

	answer++;

      }

      num = -1;
      
    } else {

      num = -1;

    }

  }

  cout << answer << endl;
  return 0;

}