import java.io.*;
public class temp {
    public static void main(String[]args)throws IOException
    {
        BufferedReader buf =new BufferedReader(new InputStreamReader(System.in));
        int n=Integer.parseInt(buf.readLine());
        String p=buf.readLine();
        StringBuilder ams=new StringBuilder("");
        for(char ch:p.toCharArray())
        {
            ams.append((char)('z'-ch-'a'));
        }
        System.out.println(ams);
    }
}