import java.util.*; public class W1C3 {public static void main (String[] args) {while (JPL.test()) {

////////////////////////////// PROBLEM STATEMENT //////////////////////////////
// Given a non-empty string and an int N, print the string made starting     //
// with char 0, and then every Nth char of the string. So if N is 3, use     //
// char 0, 3, 6, ... and so on. N is 1 or more. Implement a method to build  //
// the result string.                                                        //
//   "Miracle", 2 -> "Mrce"                                                  //
//   "abcdefg", 2 -> "aceg"                                                  //
//   "abcdefg", 3 -> "adg"                                                   //
///////////////////////////////////////////////////////////////////////////////

  // >>>>>> Your Java Code Fragment starts here <<<<<<
  Scanner keyboard = new Scanner(System.in);

  String s1 = keyboard.next();
  int n = keyboard.nextInt();

  answerYou(s1,n);
  // >>>>>> Your Java Code Fragment ends here <<<<<<
}}
// >>>>>> Your Java Methods start here <<<<<<

public static void answerYou(String s1, int n)
{
  String s3 ="";
 for(int i = 0; i < s1.length();i+=n)
   s3 += s1.charAt(i);
   System.out.println(s3);
}

// >>>>>> Your Java Methods end here <<<<<<
}