function az(input) {
    let test_str = String(input);

    let print_String = [];
    for (let i = 0; i < 115; i++) {
        let start_position = test_str.indexOf('(');
        let end_position = test_str.indexOf(')', start_position);
        var text_to_get = test_str.substr(start_position + 1, end_position - start_position - 1);
        let removed_String = test_str.substr(0, end_position + 1);
        test_str = test_str.replace(removed_String, '');

        print_String.push(text_to_get);
    }

    let x = print_String.filter(function (e) {
        return e
    }).toString();

    console.log(x);


}
az(['Rakiya (Bulgarian brandy) is self-made liquor (alcoholic drink)']);