/**
 * Created by nullzine on 2017/01/11.
 */
public class Main {

    public static void main(String[] args){
        System.out.println(new Main().decode(new java.util.Scanner(System.in).nextLine()));
    }

    private String decode(String str){
        StringBuilder ret = new StringBuilder();
        int offset=0;
        for(int i=0;i<str.toCharArray().length;i++){
            if((char)(str.charAt(i)-(i+1)+offset*26)=='@'){
                offset++;
            }
            ret.append((char)(str.charAt(i)-(i+1)+offset*26));
        }
        return ret.toString();
    }

    private String encode(String str){
        StringBuilder ret = new StringBuilder();
        int offset=0;
        for(int i=0;i<str.toCharArray().length;i++){
            if((char)(str.charAt(i)+(i+1)-offset*26)=='['){
                offset++;
            }
            ret.append((char)(str.charAt(i)+(i+1)-offset*26));
        }
        return ret.toString();
    }

}