2. Count D's

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EdabitChallenges
{
    class Program
    {

        static void Main(string[] args)
        {
            string phrase = Console.ReadLine();
            Console.WriteLine(phrase.Split('D', 'd').Length-1);
            Console.ReadLine();
        }
    }