import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		char[] a = s.toCharArray();
		char[] c = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
		int y = 0;
		for(int i=0;i<a.length;i++) {
			for(int x=0;x<c.length;x++) {
			if(a[i]==c[x]) {
				if(x-i-1<0) {
					while(x-i-1+y<0) {
						y+=c.length;
					}
					System.out.print(c[x-i-1+y]);
				}else {
				System.out.print(c[x-i-1]);
				}
			}
			}
		}
	}
}