Problem:
Score: 200 points

Problem Statement

We have a string S consisting of lowercase English letters.

If the length of S is at most K, print S without change.

If the length of S exceeds K, extract the first K characters in S, append ... to the end of them, and print the result.

Constraints

K is an integer between 1 and 100 (inclusive).

S is a string consisting of lowercase English letters.

The length of S is between 1 and 100 (inclusive).

Input

Input is given from Standard Input in the following format:

K
S

Output

Print a string as stated in Problem Statement.

Sample Input 1

7
nikoandsolstice

Sample Output 1

nikoand...

nikoandsolstice has a length of 15, which exceeds K=7.

We should extract the first 7 characters in this string, append ... to the end of them, and print the result nikoand....

Sample Input 2

40
ferelibenterhominesidquodvoluntcredunt

Sample Output 2

ferelibenterhominesidquodvoluntcredunt

The famous quote from Gaius Julius Caesar.

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            var solver = new Solver();
            solver.Calc();
        }
    }

    public class Solver
    {
        public struct AB
        {
            public int A;
            public int B;
        }

        int N;
        List<string> list = new List<string>();



        public void AddNext(string input, int count)
        {


            if (count == N)
            {
                list.Add(input + "1");
                list.Add(input + "0");
                return;
            }
            else
            {

                AddNext(input + "1", count + 1);
                AddNext(input + "0", count + 1);
            }

        }

        public void Calc()
        {
            var K = int.Parse(Console.ReadLine());
            var S = Console.ReadLine();


            if(K >= S.Length)
            {
                Console.WriteLine(S);
            }
            else
            {
                Console.WriteLine(S.Substring(0,K)+"...");

            }


            //var p = Console.ReadLine().Split().Select(x => int.Parse(x)).ToArray();




        }


    }

}