import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String n = sc.nextLine();
        char c;
        for (int i = 0; i < n.length(); i++) {
            c = n.charAt(i);
            if(c >= 'a' && c < 'z') {
                c = (char) (c + 1);
                System.out.print(c);
            }else if(c=='z'){
                c = (char) ('a');
                System.out.print(c);
            }else {
                System.out.print(c);
            }
        }
    }
}
/**************************************************************
	Problem: 1873
	User: admin
	Language: Java
	Result: Accepted
	Time:711 ms
	Memory:39560 kb
****************************************************************/