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(lines) {
    const input = lines.split('\n')
    const K = input[0]-0
    const S = input[1].split('')
    
    if(S.length <= K){
        console.log(S.join(''))
    } else {
        S.splice(K)
        console.log(S.join('') + '...')
    }
    
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));