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); } }