import java.util.Scanner;

public class Main {

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