import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int K=sc.nextInt();
      String S=sc.next();
      if(K<S.length()){
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      }else{
         System.out.println(S);
      }
   }
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int K=sc.nextInt();
      String S=sc.next();
      if(K<S.length()){
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      }else{
         System.out.println(S);
      }
   }
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int K=sc.nextInt();
      String S=sc.next();
      if(K<S.length()){
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      }else{
         System.out.println(S);
      }
   } main {
		Scanner sc = new Scanner(System.in);
      int K=sc.nextInt();
      String S=sc.next();
      if(K<S.length()){
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      }else{
         System.out.println(S);
      }
   } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int K=sc.nextInt(); K sc.nextInt() sc.nextInt sc String S=sc.next(); S sc.next() sc.next sc if(K<S.length()){
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      }else{
         System.out.println(S);
      } K<S.length() K S.length() S.length S {
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      } for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         } int i=0; int i=0; i 0 i<K i K i++ i++ i {
            System.out.print(S.charAt(i));
         } {
            System.out.print(S.charAt(i));
         } System.out.print(S.charAt(i)) System.out.print System.out System System.out S.charAt(i) S.charAt S i System.out.println("...") System.out.println System.out System System.out "..." {
         System.out.println(S);
      } System.out.println(S) System.out.println System.out System System.out S String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int K=sc.nextInt();
      String S=sc.next();
      if(K<S.length()){
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      }else{
         System.out.println(S);
      }
   }
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int K=sc.nextInt();
      String S=sc.next();
      if(K<S.length()){
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      }else{
         System.out.println(S);
      }
   }
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int K=sc.nextInt();
      String S=sc.next();
      if(K<S.length()){
         for(int i=0;i<K;i++){
            System.out.print(S.charAt(i));
         }
         System.out.println("...");
      }else{
         System.out.println(S);
      }
   }
}
