import java.util.*;
import java.util.stream.Stream;

public class No418 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
		String s = sc.next().replace("-", "");
		int count = 0;
		for(int i = 0; i < s.length(); i = i + 3) {
			if(s.charAt(i) == 'm' && s.charAt(i + 1) == 'i' && s.charAt(i + 2) == 'n') {
					if(i + 3 == s.length()) {
							count++;
					}else if(s.charAt(i + 3) != 'n') {
							count++;
					}
			}
		}
		System.out.println(count);
	}
}