At start of main, we have 0 objects.
announcer 0 is being born.
At start of f, we have 1 objects.
announcer 10 is being born.
announcer 20 is being born.
announcer 30 is being born.
At start of g, we have 4 objects.
announcer 40 is being born.
announcer 50 is being born.
announcer 60 is being born.
At end of g, we have 7 objects.
announcer 60 dies.
announcer 50 dies.
announcer 40 dies.
At end of f, we have 4 objects.
announcer 30 dies.
announcer 20 dies.
announcer 10 dies.
At end of main, we have 1 objects.
announcer 0 dies.