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 JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

function Main(input) {
	var str = input;
	str = str.split("\n");
	const MAX_LENGTH = Number(str[0].split(" ")); 
	const STRING = str[1]; 
	var  mod = "";
	if(STRING.length > MAX_LENGTH){
  		mod = STRING.substr(0, MAX_LENGTH) + '...'
	}else{
		mod = STRING;
	}
	
console.log(mod); 
}
 //*おまじない
Main(require("fs").readFileSync("/dev/stdin", "utf8"));