#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
#define int long long
using namespace std;

signed main(){
    string s;
    cin >> s;
    int ans = 0;
    int f = 0;
    rep(i, 0, s.size()){
        if(f == 0 && s[i] == 'm') f++;
        else if(f == 1 && s[i] == 'i') f++;
        else if(f == 2 && s[i] == 'n'){
            f = 0;
            ans++;
        }//else if(f == 2 && s[i] == '-')
    }
    cout << ans << endl;
}