#include<iostream>
#include<string>
#include<numeric>

int main() {
	std::string s;

	std::cin >> s;

	int count = 0;
	for (int i = 0; i < s.length(); i++) {
		if (s[i] == 'm') {
			if (s[i+1] != 'i') break;
			i++;
			while (s[i + 1] == '-')i++;
			if (s[i + 1] == 'n') count++;
		}
	}

	std::cout << count << std::endl;
	return 0;
}