# include <iostream>
# include <cstring>
# include <string>
# include <vector>
# include <cmath>
# include <sstream>
# include <algorithm>
using namespace std;

int main(){
	int sum = 0;
	string str;
	cin >> str;

	int i=0;
	int count =0;
	while(i <= str.size()){
		if(str[i] == 'm' && str[i+1] == 'i'){
			i+=2;
			count = 1;
		}else if(str[i] == '-' && count == 1){
			i++;
			count = 2;
		}else if(str[i] == 'n' && str[i+1] != 'n' && (count == 1 || count == 2)){
			i+=2;
			sum++;
		}else if(str[i] == 'n' && str[i+1] != 'n'){
			i+=2;
		}else{
			i++;
		}
	}
	cout << sum << endl;
	return 0;
}