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 Perl (5.26.1) (judge verdict: Wrong Answer)

my @arr = <STDIN>;
@arr = map { chomp; [ split(/\s+/, $_) ] } @arr;
print main(@arr);

sub main {
    my ($ln) = shift->@*;
    my ($str) = shift->@*;
    my $sfx = length($str) <= $ln ? '...' : '';
    $str = substr($str, 0, $ln);
    return "$str$sfx"
}