#include <bits/stdc++.h>
using namespace std;

int main() {
	string s;
	cin>>s;
	int j = 0;
	int count=0;
	for (int i = 0; i < s.length()-2; ++i) {
		j = i + 2;
		while (true) {
			if (s[i] == 'm' && s[i + 1] == 'i' ) {
				if (s[j] == '-') {
					j += 1;
				}else if(s[j]=='n'){
					count+=1;
					break;
				}else{
					break;
				}
			} else {
				break;
			}
		}
	}
	cout<<count<<endl;
}