import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

public class RevRecurStr {

public static String reverse(String str){

if(str==null||str.length()==1){

return str;

}

return reverse(str.substring(1)+str.charAt(0));

}

public static void main(String[] args) throws IOException {

// TODO Auto-generated method stub

//BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

InputStreamReader input=new InputStreamReader(System.in);

StringBuilder st = new StringBuilder();

char[] b = new char[2048]; // the max limit.

int read;

while( ((read = input.read(b, 0, 2048)) != -1)&&read!='\n') {

st.append(new String(b, 0, read));

}

input.close();

System.out.println(st.toString());

}

}