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# (Mono-mcs 6.8.0.105) (judge verdict: Accepted)

using System;

namespace AtCoder_Biggner168
{
    class Program
    {
        static void Main(string[] args)
        {
            // int num = int.Parse(Console.ReadLine());

            //var num = Console.ReadLine().ToCharArray();

            //if (num[num.Length - 1].Equals( '2') ||
            //    num[num.Length - 1].Equals('4') ||
            //    num[num.Length - 1].Equals('5') ||
            //    num[num.Length - 1].Equals('7') ||
            //    num[num.Length - 1].Equals('9')) Console.WriteLine("hon");
            //else if (num[num.Length - 1].Equals('0') ||
            //    num[num.Length - 1].Equals('1') ||
            //    num[num.Length - 1].Equals('6') ||
            //    num[num.Length - 1].Equals('8')) Console.WriteLine("pon");
            //else Console.WriteLine("bon");

            var num = int.Parse(Console.ReadLine());
            var str = Console.ReadLine();

            if (str.Length > num)
            {
                var ary = str.ToCharArray();

                for(int i = 0; i < num; i++) 
                {
                    Console.Write(ary[i].ToString());
                
                }
                Console.Write("...");
                Console.Write("\n");
            }
            else Console.WriteLine(str);

        }
    }
}