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 C (GCC 9.2.1) (judge verdict: Runtime Error)

#include <stdio.h>
#include <string.h>

char *cpy(char *s1,const char *s2,int n){
  char *tmp =s1;
  while(n){
    if(!(*s1++ = *s2++)) break;
    n--;
  }
  while(n--){
    *s1++ = '\0';
  }
  return tmp;
}

  int main(void){
  int k,l;
  scanf("%d",&k);
  char s1[k],s2[k];
  scanf("%s",s1);
  l = strlen(s1);
  cpy(s2,s1,k);
  printf("%s",s2);
  if (l>k);
  printf("...");
  return (0);
}