using System;
class Program {
    static void Main() {
        string s = Console.ReadLine();

        int ans = 0;
        int len = s.Length;
        for (int i = 0; i < len - 2; i++) {
            if (s[i] == 'm' && s[i + 1] == 'i') {

                for (i += 2; i < len; i++) {
                    if (s[i] == 'n') {

                        ans++;
                        break;
                    } else if (s[i] == '-') continue;
                    break;
                }

            }
        }
        Console.WriteLine(ans);
    }
}