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Lessons 1-10 and Investigation 1
Lessons 11-20 and Investigation 2
Lessons 21-30 and Investigation 3
Lessons 31-40 and Investigation 4
Lessons 41-50 and Investigation 5
Lessons 51-60 and Investigation 6
Lessons 61-70 and Investigation 7
Lessons 71-80 and Investigation 8
Lessons 81-90 and Investigation 9
Lessons 91-100 and Investigation 10
Lessons 101-110 and Investigation 11
Lessons 111-120 and Investigation 12
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