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 C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

#ifndef U_L_LONG
typedef unsigned long long U_L_LONG;
#endif
#ifndef L_LONG
typedef long long L_LONG;
#endif


static void B_eeee();

int main()
{
	B_eeee();
	
	fflush(stdout);
	return 0;
}

static void B_eeee()
{
	int N = 0, K = 0;
	char szS[16] = { 0 };

	scanf(" %d %s %d", &N, szS, &K);

	char target = szS[K - 1];

	for (int i = 0; i < N; i++) {
		if (szS[i] != target) {
			szS[i] = '*';
		}
	}

	printf("%s\n", szS);

}