import java.util.Scanner;class Main{public static void main(String[] args){Scanner s=new Scanner(System.in);int i=s.nextInt();String str=s.next();if(str.length()<=i){System.out.println(str);}else{System.out.println(str.substring(0,i)+"...");}}}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz