public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        ArrayList<Integer> list = new ArrayList<Integer>();
		for (int a=0; a<10; a++) {
			int b = Integer.parseInt(reader.readLine());
			list.add(b);
		}
		for (int d=list.size()-1; d>=0; d--) {
			System.out.print(list.get(d));
		}//напишите тут ваш код
    }
}