I don't understand the long names for each lesson? What do they mean?

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Answer: The lesson name consists of the following:

1. Swimmer skill levels, (see the Lessons Descriptions to determine your swimmer's level).
2. Then the session number is next.
3. The letters: D, H and L indicate which pool location the lesson is being held.
    D = Dupont Pool, H = Hunt Memorial and L = Livingston Park