def test23_s_relabel_nest(self):
            # create S-blossom, relabel as S, include in nested S-blossom
            self.assertEqual(maxWeightMatching([ (1,2,10), (1,7,10), (2,3,12), (3,4,20), (3,5,20), (4,5,25), (5,6,10), (6,7,10), (7,8,8) ]), [ -1, 2, 1, 4, 3, 6, 5, 8, 7 ])