import java.util.ArrayList;

 import java.util.Scanner;

 public class Text {

     @SuppressWarnings("resource")

     public static void main(String[] args) {

         Scanner scanner = new Scanner(System.in);

         int M = scanner.nextInt();//M代表输入的M串字符串

         int N=scanner.nextInt();//N代表输出的每串字符串的位数

           ArrayList<String> arrayList = new ArrayList<String>();

           ArrayList<String> arrayList1 = new ArrayList<String>();

           String[] arr=new String[M] ;

           String a=scanner.next();

           arr=a.split(",");

           for (int i = 0; i < arr.length; i++) {

             arrayList.add(arr[i]);

         }

           for (int i = 0; i < arrayList.size(); i++) {

             if (arrayList.get(i).length() < N) {

                 String temp0="" ;

                 for (int j = 0; j < N - arrayList.get(i).length(); j++) {

                     temp0 = temp0 + "0";

                 }

                 arrayList1.add(arrayList.get(i) + temp0);

             }

             if (arrayList.get(i).length() >N) {

                 String temp=arrayList.get(i);

                 int t=(int) Math.ceil((double)temp.length()/N);

                 for (int j = 0; j < t; j++) {

                     if (j==t-1) {

                         if ((temp.substring(N*j)).length()<N) {

                             String temp1 = "";

                             for (int s = 0; s < N - (temp.substring(N*j)).length(); s++) {

                                 temp1 = temp1 + "0";

                             }

                             arrayList1.add(temp.substring(N*j)+temp1);

                         }else {

                             arrayList1.add(temp.substring(N*j));

                         }

                     }else {

                         arrayList1.add(temp.substring(N*j, N*(j+1)));

                     }

                 }

               }

             }

         for (String string : arrayList1) {

             System.out.print(string+" ");

         }

     }

 }