import java.io.*;
public class Main {
	public static void main(String args[]) throws IOException {
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
		StringBuffer sb = new StringBuffer(r.readLine());
		System.out.println(sb.reverse().toString());
	}
}
/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