#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <cstdio>
#include <cmath>

using namespace std;

int main() {

	string S;
	int  cnt = 0;
	cin >> S;

	for (int l = 0; l < S.size()-2; l++) {
		if (S[l] == 'm' && S[l+1] == 'i') {
			for (int r = l + 2; r < S.size(); r++) {
				if (S[r] != '-' && S[r] != 'n') break;
				if (S[r] == 'n') {
					cnt++;
					break;
				}
			}
		}
	}

	cout << cnt << endl;

	return 0;
}