#include <iostream>
#include <string>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

int main() {
	char S[101];
	int count = 0, st = 0;

	scanf("%s", S);

	for (int i = 0; i <= strlen(S); i++)
	{
		switch (st)
		{
		case 0:
			if (S[i] == 'm') st++;
			break;
		case 1:
			if (S[i] == 'i') st++;
			else st = 0;
			break;
		case 2:
			while (S[i] == '-') i++;
			if (S[i] == 'n') st++;
			if (S[i+1] != 'n' && st == 3) count++;
			st = 0;
			break;
		default:
			printf("e");
			break;
		}
	}
	
	printf("%d\n", count);

	return 0;
}