#include<bits/stdc++.h>

using namespace std;

int main(){
    string s;
    cin>>s;
    int cnt=0;
    int flag=0;
    for(auto &it:s){
        if(it=='m')flag=1;
        if(it=='i'){
            if(flag==1)flag=2;
            else flag=0;
        }
        if(it=='-'){
            if(flag!=2)flag=0;
        }
        if(it=='n'){
            if(flag==2)cnt++;
            flag=0;
        }
            

    }
    cout<<cnt<<endl;
}