“…and the set of edges given by the following: (1,3), (1,4), (1,5), (1,7), (1,13), (1,15), (3,2), (2,4), (5,2), (2, 7), (13,2), (2,15), (3,4), (3,5), (3,7), (3,13), (3,15), (5,4), (4,7), (13,4), (4,15), (5,7), (5,13), (5,15), (7,13), (7,15), (13,15).…”