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 Python (3.8.2) (judge verdict: Accepted)

# S の長さが K 以下であれば、S をそのまま出力してください。
# S の長さが K を上回っているならば、
# 先頭 K 文字だけを切り出し、末尾に ... を付加して出力してください。

# K は 1 以上 100 以下の整数
# S は英小文字からなる文字列
# S の長さは 1 以上 100 以下

K = int(input())
S = str(input())

if K >= len(S):
    print(S)
else:
    print((S[0:K] + '...'))