51 string 

<td>
                <select name="payu_currency">
                    <option><?php echo ($payu_currency == "") ? "UAH" : $payu_currency; ?></option>
                    <option>UAH</option>
                    <option>USD</option>
                    <option>EUR</option>
                    <option>RUB</option>
                </select>
</td>