Problem:
Score : 200 points

Problem Statement

You are given a string S of length N consisting of lowercase English letters, and an integer K.
Print the string obtained by replacing every character in S that differs from the K-th character of S, with *.

Constraints

1 \leq K \leq N\leq 10

S is a string of length N consisting of lowercase English letters.

N and K are integers.

Input

Input is given from Standard Input in the following format:

N
S
K

Output

Print the string obtained by replacing every character in S that differs from the K-th character of S, with *.

Sample Input 1

5
error
2

Sample Output 1

*rr*r

The second character of S is r. When we replace every character in error that differs from r with *, we get the string *rr*r.

Sample Input 2

6
eleven
5

Sample Output 2

e*e*e*

Sample Input 3

9
education
7

Sample Output 3

******i**

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Runtime Error)

import java.util.Scanner;
import java.util.ArrayList;
public class Main {
    public static void main(String args[]){
        Scanner sn = new Scanner(System.in);
        ArrayList<String> li = new ArrayList<String>();
        while (sn.hasNextLine()) {
            String str = sn.nextLine();
            li.add(str);
        }
        String[] array = li.toArray(new String[li.size()]);
        String[] moji = array[1].split("");
        String told = array[1];
        int mojime = new Integer(array[2]).intValue();
        String t = told.substring(mojime+1,mojime+1);
        int mojisu = new Integer(array[0]).intValue();
        for(int i=0;i<mojisu;i++){
            if(moji[i]==t){
            }
            else if(moji[i]!=t){
                moji[i]="*";
            }
        }
        System.out.println(moji);
    }
}