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 JavaScript (node.js v5.12) (judge verdict: Runtime Error)

function main(arg) {
    var args = args.split('\n')
    var N = +args[0]
    var S = args[1]
    var K = args[2]
 
    var tg = S[N]
 
    var arr = []
    for(var i = 0; i < N; i++){
        if(S[i] !== tg){
            arr.push('*')
        }else{
            arr.push(S[i])
        } 
    }
    console.log(arr.join(''))
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));