/*
 *This was a program found on a midterm given out by Prof. Bellantoni at the 
 *University of Toronto for Fall 1998
 */


import java.io.*;

public class HalfTheCharacters {
   public static void main (String[] args) throws IOException {
      BufferedReader in = new BufferedReader 
               (new InputStreamReader (System.in),1);

      String line = in.readLine();

      for (int i=0; i<line.length(); i+=2) {
         System.out.println (line.charAt(i));
      }
      
     
      System.out.println();
   }
}