Given a string S, print it after changing the middle element to * (if the length of the string is even, change the 2 middle elements to *). Sample Testcase : INPUT hello OUTPUT he*lo

Given a string S, print it after changing the middle element to * (if the length of the string is even, change the 2 middle elements to *).
Sample Testcase :
INPUT
hello
OUTPUT
he*lo


const readline = require('readline');

 const inp = readline.createInterface({

  input: process.stdin

 });

 const userInput = [];

 inp.on("line", (data) => {

 userInput.push(data);

 });

 inp.on("close", () => {

 var data = userInput[0].split(" ");

 var a = String(data[0]);

 var b = a.split('')

 var c = b.length

 var d = Math.round(c/2)

{ if(c%2!==0)

 b[d-1]="*"

 else

 b[d]="*";
  b[d-1]="*"
}

 var e=b.join('')

 console.log(e);

 });