Node 8 0, 0, 0, 0 1, 1, 1, 1 2, 2, 2, 2 3, 3, 3, 3 4, 4, 4, 4 5, 5, 5, 5 6, 6, 6, 6 7, 7, 7, 7 Elem 3 4, 0, 4, 3, 5 5, 0, 4, 5, 6 6, 0, 5, 3, 6