A \((2,3)\) port-graph. [Draw this]
Since the overall type is \((2,3)\) we know we need a box with two overall inputs and three overall outputs.
There are three internal boxes, meaning the vertex set is \(\{a, b, c\}\).
\(in(a)=1\) and \(out(a)=3\) which tells us to draw one port on the LHS and three on the RHS.
The bijection \(i\) tells us how the ports are connected by wires.
The acyclic internal flow graph is shown below [TODO Draw this]