#include <bits/stdc++.h>
#define rep(i,n) for (int i=0; i<(n); ++i)
using namespace std;
using ll=long long;
int main(){
    string s;
    cin>>s;
    vector<bool>ok(3);
    rep(i,3){
        ok[i]=false;
    }
    int n=s.length();
    int ans=0;
    rep(i,n){
        if(s[i]=='m'){
            ok[0]=true;
        }
        else if(s[i]=='i'&&ok[0]==true){
            ok[1]=true;
        }
        else if(s[i]=='n'&&ok[1]==true){
            ok[2]=true;
        }
        else if(ok[1]==false&&s[i]=='-'){
            ok[0]=false;
            ok[1]=false;
            ok[2]=false;
        }
        if(ok[0]==true&&ok[1]==true&&ok[2]==true){
            ans++;
            ok[0]=false;
            ok[1]=false;
            ok[2]=false;
        }
    }
    cout<<ans<<endl;
}