<tr t-foreach="get_objects(docs)" t-as="a">

    <td class="text-center">
        <span t-esc="a_index+1"/>
    </td>
    <td class="text-left">
        <span t-raw="'%s' %  a if  a else''"/>

    </td>

<td t-foreach="a_value" t-as=" lines">
          <t t-foreach="lines" t-as="line">
           <t class="text-right">
                 <span t-esc="'%s' % lines if lines else ''"/>              
              
          </t>
</td>

</tr>

in this code a_value contains list type it has marks i want to print those marks

but i am not able to print a_value in loop

please help me to do this.