#include <iostream>
#include <string>

enum state
{
    m, i, e
};

int main()
{
    std::string str;
    std::cin >> str;

    unsigned int count = 0;
    state current_state = e;
    for(auto c: str)
    {
        switch(current_state){
            case state::m:
                if(c == 'i'){current_state = state::i;}
                else if(c == 'm'){current_state = state::m;}
                else{current_state = e;}
                break;
            case state::i:
                if(c == '-'){current_state = state::i;}
                else if(c == 'n'){current_state = state::e; count++;}
                else if(c == 'm'){current_state = state::m;}
                else{current_state = e;}
                break;
            case state::e:
                if(c == 'm'){current_state = state::m;}
                else{current_state = e;}
                break;
        }
    }

    std::cout << count <<std::endl;

    return 0;
}