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

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