<td>{$a.date|date_format|default:'-'}</td>
<td>{$a.last|date_format|default:'-'}</td>
<td class='center'>{$a.nb|default:"-"}</td>
<td>{$a.date|date_format|default:'-'}</td>
<td>{$a.last|date_format|default:'-'}</td>
<td class='center'>{$a.nb|default:"-"}</td>