Generate program that has the following intention:

The intention of the program below is to find the minimum spanning tree (MST) of a weighted graph. The function minimum_spanning_tree takes a weighted graph as input, represented by a dictionary weight_by_line. The keys are pairs of nodes (i, j), and the values are the weights of the edges connecting those nodes.

The function creates a set mst_edges to store the edges of the minimum spanning tree. It also creates a dictionary divide_by_point to store the nodes that divide the graph into two parts. Each key in divide_by_point is a node, and each value is a set containing only that node.

The function iterates through the sorted edges in weight_by_line, and for each edge (i, j), it checks if the nodes i and j have already been assigned to different parts of the graph. If they haven't, it updates the parts of the graph divided by i and j, and adds the edge to the MST.

After iterating through all the edges, the function returns the set of edges that form the minimum spanning tree. Give two different versions of responses. Please separate the responses with 6 asterisk symbols: ******.
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