class Program
{
    static void Main(string[] args)
    {
        string inputWord = Console.ReadLine()!;
        List<string> minList = new List<string>();
        string word = "";
        
        foreach (char c in inputWord)
        {
            word += c;
            if (c == 'n')
            {
                minList.Add(word);
                word = "";
            }
        }

        int count = 0;
        for (int i = 0; i < minList.Count; i++)
        {
            if (minList[i].Contains("mi"))
            {
                if (i + 1 != minList.Count && minList[i + 1] != "n")
                {
                    count++;
                }
                else if (i + 1 == minList.Count)
                {
                    count++;
                }
            }
        }

        Console.WriteLine(count);
    }
}