let inputArea = document.getElementsByClassName('desription-app__input-text')[0];
let outputArea = document.getElementsByClassName('desription-app__output-text')[0];
let desciptButton = document.getElementsByClassName('desription-app__descript-button')[0];

desciptButton.addEventListener('click', () => {
    outputArea.value = edwardDecrypt(inputArea.value).join('');
});

function edwardDecrypt(inputText) {
    let arrayOfSymbols = inputText.split('');
    let lengthOfSymbolsArray = inputText.split('').length;
    let output = [];

    for (let i = 0; i < lengthOfSymbolsArray; i++) {
        if (i == lengthOfSymbolsArray - 1 || arrayOfSymbols[i] != arrayOfSymbols[i + 1]) {
            output.push(arrayOfSymbols[i]);
            continue;
        }
        while (i + 1 < lengthOfSymbolsArray && arrayOfSymbols[i] == arrayOfSymbols[i + 1]) {
            i++;
        }
    }
    return output;

}