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

namespace Caesar
{

    class Program

    {

        static void Main(string[] args)

        {
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            char[] storeletter = new char[26] { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'q', 'x', 'y' ,'z'};
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            int Knumber = 3;
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            int lettere = 0;
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            string temp = string.Empty;
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            string Enterletter = string.Empty;
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            Console.WriteLine("entre:");
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            Enterletter = Console.ReadLine();
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            for (int i = 0; i <= Enterletter.Length - 1; i++)
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            {
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                for (int j = 0; j <= storeletter.Length - 1; j++)
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                {
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                    if (Enterletter[i] == storeletter[j])
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                    {
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                        lettere = j;
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                        int c = (lettere + Knumber) % 26;
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                        temp += storeletter[c].ToString();
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                    }
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                }
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            }
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            Console.WriteLine(temp);
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            Console.Read();
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        }
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    }
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}