using System;

using System.Linq;

​

namespace CSharp

{

    public class Program

    {

        public static void Main(string[] args)

        {

            string input = Console.ReadLine();

            int nbI = input.Count(x => x == 'I');

            int nbX = input.Count(x => x == 'X');

​

            Console.WriteLine($"{nbI}{nbX}");

        }

    }

}