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

namespace ConsoleApplication2
{
    class Program
    {


        static void Main(string[] args)
        {
                string gomla = Console.ReadLine();
                int spaces = 0;

                for (int i = 0; i < gomla.Length; i++)
                {
                    if(gomla[i]== ' ') spaces++;

                }
            Console.WriteLine(spaces);

        }

    }
}