809

using System;
using System.Collections.Generic;
using System.Text;

namespace ExamTasks
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            string stringN = n.ToString();
            int multiplicity = 0;
            StringBuilder str = new StringBuilder();
            if (stringN.Length % 3 == 0)
                multiplicity = 0;
            if (stringN.Length % 3 == 1)
            {
                str.Append(stringN[0].ToString() + " ");
                multiplicity = 1;
            }
            if (stringN.Length % 3 == 2)
            {
                str.Append(stringN[0].ToString() + stringN[1].ToString() + " ");
                multiplicity = 2;
            }
            for (int i = multiplicity; i + 2 < n.ToString().Length; i += 3)
            {
                str.Append(stringN[i].ToString() + stringN[i + 1].ToString() + stringN[i + 2].ToString());
                if (i + 3 < n.ToString().Length - 1)
                    str.Append(" ");
            }
            Console.WriteLine(str);
        }
    }
}