def chvatal_graph(create_using=None):
 description = ['adjacencylist', 'Chvatal Graph', 12, [[2, 5, 7, 10], [3, 6, 8], [4, 7, 9], [5, 8, 10], [6, 9], [11, 12], [11, 12], [9, 12], [11], [11, 12], [], []]]
 G = make_small_undirected_graph(description, create_using)
 return G

def chvatal_graph ( create_using = None ) : description = [ 'adjacencylist' , 'Chvatal Graph' , 12 , [ [ 2 , 5 , 7 , 10 ] , [ 3 , 6 , 8 ] , [ 4 , 7 , 9 ] , [ 5 , 8 , 10 ] , [ 6 , 9 ] , [ 11 , 12 ] , [ 11 , 12 ] , [ 9 , 12 ] , [ 11 ] , [ 11 , 12 ] , [ ] , [ ] ] ] G = make_small_undirected_graph ( description , create_using ) return G
return the chvátal graph .