#include <iostream>
using namespace std;

int main(){
    string str;
    cin>>str;
    int i=0;
    int count=0;
    bool mi=false;
    while(i<str.size()){
        if(str[i]=='m'){
            if(i+1<str.size()&&str[i+1]=='i'){
                mi=true;
                i+=2;
                continue;
            }else{
                mi=false;
                i++;
                continue;
            }
        }
        if(str[i]=='-'){
            i++;
            continue;
        }
        if(str[i]=='n'){
            if(mi){
                count++;
                mi=false;
            }
            i++;
            continue;
        }
    }
    cout<<count<<endl;
    return 0;
}