#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

int main(){
    string S;
    cin >> S;
    int k = 0, ans = 0;
    rep(i, sz(S)){
        if(i < sz(S) - 1 && k == 0 && S[i] == 'm'&&S[i + 1] == 'i'){
            k++;
        } else if(k == 1 && S[i] == 'n'){
            k = 0;
            ans++;
        }
    }
    cout << ans << endl;
}