Long description
In the diagram the flow is from right to left as follows:
Node 1 is on the extreme right.
Nodes 2, 3, and 4, one below the other, are to the left of node 1.
Nodes 5 and 6, one below the other, are to the left of nodes 2, 3, and 4.
Node 7 is below node 5 but slightly inclined to the left.
Node 8 is at extreme left in the bottom.
An arc exists between node 1 and node 2 with the numbers 2 and 0 beside the corresponding nodes.
An arc exists between node 1 and node 3 with the numbers 5 and 0 beside the corresponding nodes.
An arc exists between node 1 and node 4 with the numbers 1 and 1 beside the corresponding nodes.
An arc exists between node 2 and node 5 with the numbers 2 and 2 beside the corresponding nodes.
An arc exists between ...
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