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();
        sc.close();

        if (K >= S.length()) {
            System.out.println(S);
        } else {
            for (int i = 0; i < K; i++) {
                System.out.print(S.charAt(i));
            }
            System.out.println("...");
        }

    }
} 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();
        sc.close();

        if (K >= S.length()) {
            System.out.println(S);
        } else {
            for (int i = 0; i < K; i++) {
                System.out.print(S.charAt(i));
            }
            System.out.println("...");
        }

    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        String S = sc.next();
        sc.close();

        if (K >= S.length()) {
            System.out.println(S);
        } else {
            for (int i = 0; i < K; i++) {
                System.out.print(S.charAt(i));
            }
            System.out.println("...");
        }

    } main {
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        String S = sc.next();
        sc.close();

        if (K >= S.length()) {
            System.out.println(S);
        } else {
            for (int i = 0; i < K; i++) {
                System.out.print(S.charAt(i));
            }
            System.out.println("...");
        }

    } 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 sc.close() sc.close sc if (K >= S.length()) {
            System.out.println(S);
        } else {
            for (int i = 0; i < K; i++) {
                System.out.print(S.charAt(i));
            }
            System.out.println("...");
        } K >= S.length() K S.length() S.length S {
            System.out.println(S);
        } System.out.println(S) System.out.println System.out System System.out 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 "..." 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();
        sc.close();

        if (K >= S.length()) {
            System.out.println(S);
        } else {
            for (int i = 0; i < K; i++) {
                System.out.print(S.charAt(i));
            }
            System.out.println("...");
        }

    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        String S = sc.next();
        sc.close();

        if (K >= S.length()) {
            System.out.println(S);
        } else {
            for (int i = 0; i < K; i++) {
                System.out.print(S.charAt(i));
            }
            System.out.println("...");
        }

    }
} 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();
        sc.close();

        if (K >= S.length()) {
            System.out.println(S);
        } else {
            for (int i = 0; i < K; i++) {
                System.out.print(S.charAt(i));
            }
            System.out.println("...");
        }

    }
}
