output_name xmas

$object
  index 0

  $merge
    index 3
    side top
  $END

$END

$object
  index 1

  $merge
    index 2
    side top
  $END

$END

$object
  index 6

  $merge
    index 7
    side top
  $END

$END

$object
  index 8

  $merge
    index 9
    side top
    keep_piece
  $END

$END
