package yukicoder;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		// String text = "abc";
		// String data1 = ceaserEncoding(text, 3);
		// System.out.println(data1);
		// System.out.println(ceaserDecoding(data1, 3));
		
		System.out.println(ursarEncoding(s));
		
			
	}
	public static String ursarEncoding(String text) {
		String data = "";
		for (int i = 0; i < text.length(); i++) {
			data = data + String.valueOf((char)(text.charAt(i) - (i + 1)));
		}
		return data;
	}
	public static String ceaserEncoding (String text, int no) {
		String data1 = "";
		for (int i = 0; i < text.length(); i++) {
			data1 = data1 + String.valueOf((char)(text.charAt(i) + no));
		}
		return data1;
	}
	public static String ceaserDecoding (String text, int no) {
		String data1 = "";
		for (int i = 0; i < text.length(); i++) {
			data1 = data1 + String.valueOf((char)(text.charAt(i) - no));
		}
		return data1;
		
	}


}