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;
using System.Text;

namespace ABC168_B
{
    class Program
    {
        static void Main(string[] args)
        {
            // 出力文字
            string output = string.Empty;

            // 桁数を入力
            int k = int.Parse(Console.ReadLine());

            // 文字を入力
            string s = Console.ReadLine();

            // 桁数チェック
            if (s.Length > k)
            {
                // 指定桁数オーバーの場合、切り取り
                output = s.Substring(0, k) + "...";
            }
            else
            {
                output = s;
            }

            // 出力
            Console.WriteLine(output);
        }
    }
}