code kata absolute beginner 24 questions

I have tried in vs code and guvi ide platform, there are correct result from both platforms, but I have error from code kata platform.
Question:
Write a code get an integer number as input and print the odd and even digits of the number separately.

Input Description:
A single line containing an integer.

Output Description:
Print the even and odd integers of the integer in a separate line.

Sample Input :
1234

Sample Output :
2 4
1 3

I tried program answer:
// Getting input via STDIN

const readline = require("readline");

const inp = readline.createInterface({

input: process.stdin

});

const userInput = [];

inp.on("line", (data) => {

userInput.push(data);

// console.log('entered data is:', data);

// console.log(userInput);

});

inp.on("close", () => {

//start-here

//Your code goes here … replace the below line with your code logic

let N = userInput[0];

//console.log(N);

let arr = [];

for (i=0; i<=N.length-1; i++){

arr.push(N[i]);

}

//console.log(arr);

//console.log(arr.length);

let even = [];

let odd = [];

for (let i = 0; i < arr.length; i++) {

if (arr[i] % 2 === 0) {

even += arr[i] + " ";

} else {

odd += arr[i] + " ";

}

}

console.log(even);

console.log(odd);

//end-here

});

I have error: