#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <iomanip>
#include <math.h> 
#include <stack>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <tuple>
#include <cctype>
#include <ctype.h>
#include <set>
#include <sstream>

using namespace std;


int main() {
	int i, j, k;
	string s;

	cin >> s;

	int cnt = 0;

	for (i = 0; i < s.length(); ) {
		if (s.find("mi", i) != string::npos) {

			int iti = s.find("mi", i);
			for (j = iti + 2; j < s.length(); j++) {
				if (s[j] != 'n' && s[j] != '-') {
					break;
				}
				else if (s[j] == 'n') {
					cnt++;
					break;
				}
				else if (s[j] == '-') {

				}
			}
			//i = iti + 1;
			i = j;
		}
		else {
			break;
		}
	}

	cout << cnt << endl;


	getchar();
	getchar();
	return 0;
}