consider the following definition: A subgraph H of a graph G is called an elementary subgraph if each component of H is either an edge ( K2 ) or a cycle of length at least 3. A spanning elementary subgraph is a subgraph having all components either path(i.e. K2) or cycles and verex set is same as those of G. for example consider the graph C4 with V(G)={1,2,3,4}. then it has 3 spanning elementary subgraphs two edge components namely {12,34};{14,23} and the whole cycle itself.The cycle is named in anticlockwise direction. Now my problem is: Consider the following code: G=graphs.EmptyGraph() G.add_edges([(1,2),(2,3),(3,4),(4,5),(5,1),(6,5),(6,8),(8,9),(7,9),(7,6),(7,10),(10,11),(10,12),(11,12)]) G.show() Can we have a sage code that gives all possible spanning subgraphs of this graph.