import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


class Main{
    public static void main(String[] a) throws IOException{
        BufferedReader br  = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		StringBuffer str1 = new StringBuffer("");
		if(str != null && !str.isEmpty()) {
			int l =str.length();
			for(int i=l-1;i>=0;i--) {
				str1.append(str.charAt(i));
			}
			System.out.println(str1);
		}
    }
}
/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