How do I add space between span in html for emails?

I am making email templates so I am limited with what I can do.

I've got align="center" but I still need space between the two spans. How can I do this?

CODE:

<td width="659" height="28" bgcolor="#999999" align="center">
    <span style="color: #ffffff;font-family: Arial, sans-serif;font-size:20px;">
    CODE:</span> <span style="color: #ffffff;font-family: Arial, sans-serif;
    font-size:20px;font-weight:bold;">BEHAPPY</span><span style="color: #ffffff;
     font-family: Arial, sans-serif;font-size:20px;">• Ends 6/01</span>
            </td>

NOTE: I can't use margins or padding in email templates.