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)

// parameter "input" gets all data
function Main(input) {
 // the first line is assigned to input[0], the second line is assigned to input[1] similarly.
 input = input.split("\n");
 // convert string from integer using "parseInt"
 var s = parseInt(input[0], 10);
 var k = input[1] 
 var ans
  if (s>=k.length){
    ans=k
  } else {
    ans=k.substr(0,s)+'...'
  }
 //output
 console.log(ans)
}
// Don't edit this line!
Main(require("fs").readFileSync("/dev/stdin", "utf8"));