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

namespace ConsoleApplication1
{
class Program
{
    static void Main(string[] args)
    {
        string str;
        string[] stra;

        while (true)
        {
            str = Console.ReadLine();
            stra = str.Split(' ');




            for(int i = 0; i < stra.Length; i++)
            {
                switch (stra[i])
                {

                    case "1":
                        Console.Write("z");
                        break;
                    case "2":
                        Console.Write("x");
                        break;
                    case "3":
                        Console.Write("v");
                        break;
                    case "4":
                        Console.Write("u");
                        break;
                    case "5":
                        Console.Write("t");
                        break;
                    case "6":
                        Console.Write("s");
                        break;
                    case "7":
                        Console.Write("r");
                        break;
                    case "8":
                        Console.Write("q");
                        break;
                    case "9":
                        Console.Write("p");
                        break;
                    case "10":
                        Console.Write("o");
                        break;
                    case "11":
                        Console.Write("n");
                        break;
                    case "12":
                        Console.Write("m");
                        break;
                    case "13":
                        Console.Write("l");
                        break;
                    case "14":
                        Console.Write("j");
                        break;
                    case "15":
                        Console.Write("i");
                        break;
                    case "16":
                        Console.Write("h");
                        break;
                    case "17":
                        Console.Write("g");
                        break;
                    case "18":
                        Console.Write("f");
                        break;
                    case "19":
                        Console.Write("e");
                        break;
                    case "20":
                        Console.Write("d");
                        break;
                    case "21":
                        Console.Write("c");
                        break;
                    case "22":
                        Console.Write("b");
                        break;
                    case "23":
                        Console.Write("a");
                        break;
                }

            }
            Console.Write("n");

        }





    }
}
}