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: Accepted)

import java.util.*;
import java.io.*;
import java.lang.*;

public class Main{
 public static void main(String[] args){
  Scanner s = new Scanner(System.in);
   int k = s.nextInt();
   s.nextLine();
   String inp = s.nextLine();
   int rep = s.nextInt();
   char txt = inp.charAt(rep-1);
   String res = "";
   
   for(int i=0; i<k; i++){
   if(inp.charAt(i) != txt){
   res = res +'*' ;
   }
     else{
     res = res + txt;
     }
   }
   
   System.out.print(res);
 }
}