#include <iostream>
using namespace std;

int main(){
	int ans = 0;
	string s;
	cin >> s;
	for(int i = 0;i < s.size() - 1;i++) if(s[i] == 'm' && s[i + 1] == 'i'){
		i += 2;
		while(i < s.size() - 1 && s[i] == '-') i++;
		if(s[i] == 'n') ans++;
	}
	cout << ans << endl;
}