import java.io.*;

class Main {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));// ??\????????????????????????
            String line = br.readLine(); // ??\???????????????????????\???
            int i = line.length();
            StringBuilder sb = new StringBuilder();
            	while(i > 0){
            		sb.append(line.substring(i-1, i));
            		i--;
            	}
            	System.out.println(sb);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
/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