The digits: edge list 0 0, 1, 2, 4, 5, 6 1 2, 5 2 0, 2, 3, 4, 6 3 0, 2, 3, 5, 6 4 1, 2, 3, 5 5 0, 1, 3, 5, 6 6 0, 1, 3, 4, 5, 6 7 0, 2, 5 8 0, 1, 2, 3, 4, 5, 6 9 0, 1, 2, 3, 5, 6