#include <bits/stdc++.h>

using namespace std;

int main() {
    string s;
    string min_str = "";
    
    cin >> s;
    
    for (int i = 0; i < s.length(); i++) {
        if (s[i] != '-') {
            min_str += s[i];
        }
    }
    
    int ct = 0;
    for (int i = 0; i < min_str.length() - 2; i++) {
        if (min_str[i] == 'm' && min_str[i + 1] == 'i' && min_str[i + 2]) {
            ct++;
        }
    }
    
    cout << ct << endl;
    
    return 0;
}