import java.io.FileReader;
import java.io.CharArrayReader;
import java.io.Reader;

public class Main {
    public static void main(String[] args) throws Exception {
        Reader inf = new CharArrayReader(new char[] { 'h', '\r', '\n'});
        int chCode;
        while (-1 != (chCode = inf.read())) System.out.print("2" + (char) chCode + "1");
        inf.close();
    }
}