import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    char[] sch = s.toCharArray();
    char[] ansch = new char[s.length()];
    char a = 'B' - 'A';
    char b = 'Z' - 'A';
    for(int i = 0; i < s.length(); i++) {
      char c = sch[i];
      int move = (i + 1) % 26;
      for(int j = 0; j < move; j++) {
        if(c == 'A') {
          c += b;
        } else {
          c -= a;
        }
      }
      ansch[i] = c;
    }
    String ans = new String(ansch);
    System.out.println(ans);
  }
}