function solve() {

    let inputText = document.getElementById('arr').value;

    let inputArr = JSON.parse(inputText);

    inputArr.forEach((word, index, arr) => {
        arr[index] = word.split('').join('');
    });

    let b = inputText.split(',').map(Number);
    let sorted = b.sort((a, b) => a - b);


    console.log(b.sort()); //descending ERROR [NaN, Nan, Nan....] why ?
    console.log(inputArr.sort()); //alphabetically - correctly