using System.Text;
using System;

public class Hello
{
    static void Main()
    {
        Console.ReadLine();
        var s = Console.ReadLine().Trim();
        var sb = new StringBuilder();
        var w = 'a' + 'z';
        foreach (var x in s) sb.Append((char)(w - x));
        Console.WriteLine(sb);
    }
}