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 Scala (2.13.1) (judge verdict: Wrong Answer)

object Main extends App{
  var n = scala.io.StdIn.readInt
  var s = scala.io.StdIn.readLine
  var length = s.length
  if (length-n <= 0){
    printf("%s",s)
  }else{
    for(i <- 1 to n){
      printf("%s",s.apply(0))
      s=s.drop(1)
    }
    for(l <- 1 to length-n){
      printf(".")
    }
  }
}