#define _USE_MATH_DEFINES	//M_PI(π),M_SQRT2(√2)
#include <iostream>			//std::cout, std::cin
#include <string>			//std::string,std::to_string(C++11)
#include <vector>			//std::vector
#include <valarray>			//std::valarray
#include <algorithm>		//std::sort
#include <time.h>			//localtime_s
#include <cstdlib>			//abs
#include <cmath>			//abs,std::pow,sqrt,sin,cos,round,floor,ceil
#include <fstream>			//std::ifstream,std::ofstream
#include <iomanip>			//std::setprecision,std::setw,std::setfill
#include <random>			//std::random(C++11)
#include <numeric>			//std::accumulate
#include <functional>		//std::greater

int main(void) {

	//test用
	//std::ifstream in("123.txt");
	//std::cin.rdbuf(in.rdbuf());

	std::string S;
	std::cin >> S;

	unsigned int st = 0, ed = 0, ans = 0;
	while (1) {
		st = S.find("mi", st);
		if (st > S.length()) {
			break;
		}
		ed = S.find("n", st);
		if (ed > S.length()) {
			break;
		}
		if (ed - st == 2) {
			ans++;
		}
		else {
			int a = std::count(S.begin() + st + 2, S.begin() + ed, '-');
			if (ed - (st + 2) == std::count(S.begin() + st + 2, S.begin() + ed, '-')) {
				ans++;
			}
		}
		st = st + 2;
	}

	std::cout << ans << std::endl;
}