import java.util.Scanner;

public class Main {
  public static void main(String[] args ){
    Scanner sc = new Scanner(System.in);

    char ch = (char)( ((int)sc.next().charAt(0)) + 1 );

    System.out.println(ch);

  }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz