Network #1
  SPF node 3 leaves 2 subnets

Network #2
  No SPF nodes

Network #3
  SPF node 2 leaves 2 subnets
  SPF node 3 leaves 2 subnets

Network #4
  No SPF nodes

Network #5
  No SPF nodes

Network #6
  SPF node 2 leaves 2 subnets

Network #7
  SPF node 1 leaves 4 subnets

Network #8
  SPF node 1 leaves 2 subnets
  SPF node 2 leaves 3 subnets
  SPF node 3 leaves 2 subnets

Network #9
  No SPF nodes

