import java.util.*;
public class Main{
public static void main(String[] args){
Scanner s=new Scanner(System.in);
int len=s.nextInt();
  String string=s.next();
  char[] arr=string.toCharArray();
  for(int j=0;j<arr.length;j++){
  for(int i=0;i<len;i++){
    if(arr[j]=='Z')
      arr[j]='A';
    else
      ++arr[j];
  }
  }
  System.out.println(Arrays.toString(arr).substring(1,3*arr.length-1).replaceAll(", ",""));
}}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz