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

namespace _04.Split_ByWordCasing
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> input = Console.ReadLine().Split().ToList();

            List<string> lowerCase = new List<string>();
            List<string> mixedCase = new List<string>();
            List<string> upperCase = new List<string>();

            for (int i = 0; i < input.Count; i++)
            {
                if (char.IsLower(input[i]))
                {
                    lowerCase.Add(input[i]);
                }
            }

        }
    }
}