import java.io.*;

public class Main {

    public static void main(String[] args) throws IOException {
	// write your code here
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter pw =new PrintWriter(new OutputStreamWriter(System.out));
        char n = br.readLine().charAt(0);
        pw.println((char)(((int)n)+1));pw.flush();
    }
}

/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