import java.util.*;

public class Exercise65{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    String str = sc.next();

    char[] strArray = str.toCharArray();
    char[] newStrArray = new char[strArray.length];

    for (int i = 0; i < strArray.length; i++){
      int num = (int)strArray[i];
      num -= (i + 1);
      num = getNum(num);
      newStrArray[i] = (char)num;
    }

    String newStr = String.valueOf(newStrArray);
    System.out.println(newStr);
  }

  private static int getNum(int num){
    if (num < 65){
      num = 90 - (64 - num);
      return getNum(num);
    }else{
      return num;
    }
  }
}