/*przyklad 3 */

var box3 = document.querySelectorAll('.sample_class_2 li');
console.log(box3);
function getInnerText(element) {
    var arr = [];
    for (var i=0;i< element.innerText.length; i++) {
        arr.push(element.innerText[i]);
    }

    return arr;

}
console.log(getInnerText(box3));