
import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int k = sc.nextInt();
    sc.nextLine();
    String s = sc.nextLine();
    sc.close();
    if(s.length() <= k) {
      System.out.println(s);
    }else {
      System.out.println(s.substring(0, k) + "...");
    }
  }

} import java.util.Scanner; Scanner java.util public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int k = sc.nextInt();
    sc.nextLine();
    String s = sc.nextLine();
    sc.close();
    if(s.length() <= k) {
      System.out.println(s);
    }else {
      System.out.println(s.substring(0, k) + "...");
    }
  }

} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int k = sc.nextInt();
    sc.nextLine();
    String s = sc.nextLine();
    sc.close();
    if(s.length() <= k) {
      System.out.println(s);
    }else {
      System.out.println(s.substring(0, k) + "...");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int k = sc.nextInt();
    sc.nextLine();
    String s = sc.nextLine();
    sc.close();
    if(s.length() <= k) {
      System.out.println(s);
    }else {
      System.out.println(s.substring(0, k) + "...");
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc sc.nextLine() sc.nextLine sc String s = sc.nextLine(); s sc.nextLine() sc.nextLine sc sc.close() sc.close sc if(s.length() <= k) {
      System.out.println(s);
    }else {
      System.out.println(s.substring(0, k) + "...");
    } s.length() <= k s.length() s.length s k {
      System.out.println(s);
    } System.out.println(s) System.out.println System.out System System.out s {
      System.out.println(s.substring(0, k) + "...");
    } System.out.println(s.substring(0, k) + "...") System.out.println System.out System System.out s.substring(0, k) + "..." s.substring(0, k) s.substring s 0 k "..." String[] args args public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int k = sc.nextInt();
    sc.nextLine();
    String s = sc.nextLine();
    sc.close();
    if(s.length() <= k) {
      System.out.println(s);
    }else {
      System.out.println(s.substring(0, k) + "...");
    }
  }

} public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int k = sc.nextInt();
    sc.nextLine();
    String s = sc.nextLine();
    sc.close();
    if(s.length() <= k) {
      System.out.println(s);
    }else {
      System.out.println(s.substring(0, k) + "...");
    }
  }

} Main

import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int k = sc.nextInt();
    sc.nextLine();
    String s = sc.nextLine();
    sc.close();
    if(s.length() <= k) {
      System.out.println(s);
    }else {
      System.out.println(s.substring(0, k) + "...");
    }
  }

}
