user
What is the correct taxonomic synonym for the species previously known as "Enterobacter aerogenes" and what led to the change in its designation to "Klebsiella aerogenes"?
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

The answer is 42.

<|end_of_solution|>