Consider the following program in the picture below.

We can determine the number of lines of output by simply counting the number of printf vertices in the process graph $($Figure $8\mathrm{.}49).$ In this case, there are seven such vertices, and thus the program will print seven lines of output.

Any output sequence corresponding to a topological sort of the graph is possible. For example: Start, $0,1,$ Child, Stop, $2,$ Stop is possible.

Based on all of the information provided and the code, what are all $7$ possibilities of outputs? I need the actual outputs that could be printed.