#include<string>
#include<iostream>
#include<algorithm>
#include<set>
#include<math.h>
#include<vector>
#include<sstream>
#include<queue>
#include<functional>
#include<bitset>
#include<cstdio>
using namespace std;

int main() {
	string s;
	cin >> s;
	int c = 0;
	for (int i = 0; i < s.length(); i++) {
		if (s[i] == '-') {
			s.erase(i, 1);
			i--;
		}
	}
	for (int i = 0; i < s.length()-2; i+=3) {
		if (s[i] == 'm' &&s[i + 1] == 'i' &&s[i + 2] == 'n')c++;
	}
	cout << c << endl;

	return 0;
}