def pappus_graph():
 G = LCF_graph(18, [5, 7, (-7), 7, (-7), (-5)], 3)
 G.name = 'Pappus Graph'
 return G

def pappus_graph ( ) : G = LCF_graph ( 18 , [ 5 , 7 , ( - 7 ) , 7 , ( - 7 ) , ( - 5 ) ] , 3 ) G . name = 'Pappus Graph' return G
return the pappus graph .