#include<iostream>
#include<vector>
#include<string>
#include<cstdio>
using namespace std;
int main(){
    string s;
    int count = 0;
    cin >> s;
    for(int i=0;s[i+2]!='\0';i++){
        if(s[i]=='m'&&s[i+1]=='i'){
            for(int j=i+2;s[j]!='\0';j++){
                if(s[j]=='-'){
                }
                else if(s[j]=='n'){
                    count++;
                }
                else{
                    break;
                }
            }
        }
    }
    cout << count << endl;
    return 0;
}