<image>There are six different numbers, $$-1$$, $$-2$$, $$-3$$, $$-4$$, $$-5$$, and $$-6$$, labeled on the six faces of a cube, one number on each face. Each number is unique. The following image shows three different orientations of the cube. The numbers on the bottom faces of the three cubes are denoted as $$a$$, $$b$$, and $$c$$, respectively. Then, the value of $$a+b+c+abc=$$ ______.
