#include<iostream>
#include<string>
using namespace std;

int main() {
	int ans = 0, i = 0;
	string s;
	cin >> s;

	while (s[i] != '\0') {
		if (s[i] == 'm' && s[i+1] == 'i') {
			i += 2;
			while (s[i] == '-') {
				i++;
			}
			if (s[i] == 'n') {
				ans++;
			}
		}
		i++;
	}

	cout << ans << endl;

	return 0;
}