Code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Globalization;

namespace _1601AntiCAPS
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.In.ReadToEnd();
            //string input;
            while (input != null)
            {
                Console.Write(input[0]);
                for (int i = 1; i < input.Length; i++)
                {

                    if (input[i] >= 'A' && input[i] <= 'Z')
                    {
                        int c = Convert.ToInt32(input[i]);
                        char character = (char)(c + 32);
                        string text = character.ToString();
                        Console.Write(text);
                    }
                    else
                        Console.Write(input[i]);
                }
            }
        }
    }
}