$$____________$$
        $___$________$___$
        $_____$$$$$$_____$
       $_____sss___sss____$
      $______ii_____ii_____$
       $_______$$$________$
$$$$$$$$     $_______$________$
$$________$       $$_________$$
$_________$     $___$$$$$___$
$______$    $__$________$__$
$_____$    $__$__________$__$
$____$   $$$$__$__________$__$$$$
$___$    $____$__$________$___$___$
$__$     $____$__$________$__$____$
$___$      $____$__$____$_$__$____$
$__$      $____$___$_$_____$___$
$___$$$$$_$___$___$_$____$___$
$$$$$_$____$____$_____$____$
      $$$_$_____$______$_$$$
           $$$$___$$$$$