How to draw a block diagram in a Moore machine?

Question

Programming

Synthesize a recognizing machine for sorting products moving on a conveyor according to their length. The sensors generate signals a, b, c (inverse signals ) in the event of the appearance (disappearance) of a product passing by the corresponding support. A fragment of issuing signals a and b is shown in fig. 4.2. The sorting of products by length is determined by the following output signals:

I literally need to understand how exactly to describe the transition from one state to another