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-csc 3.5.0) (judge verdict: Accepted)

using System;

public class MainAppB
{
    static public void Main(string[] args)
    {
        var k = int.Parse(Console.ReadLine());
        var s = Console.ReadLine();
        if(s.Length <= k) {
            Console.WriteLine(s);
        }
        else {
            var s2 = s.Substring(0, k) + "...";
            Console.WriteLine(s2);
        }
    }
}