for my $node_main (@nodes_from_main)
{   
   for my $node_second (@nodes_from_second)  
   if (text from main equal text from second, "which I did already")
  {
     <p> print my matching node from the second file;<br> 
      How to do this part</p>
  }
  esle
  {
    do nothing;
  }
}