Have you tried this lesson yet? It is quickly becoming my favorite lesson!
This is the 30 minute version! Try it out! 
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Coupon Name: Try My Favorite Lesson! 
Code: 6555e68d
Discount Rate: 30%
For Lesson: 45 Question Challenge
Effective for lessons conducted between: Apr 29, 2017 ~ May 6, 2017
URL: http://cafetalk.com/user/coupon/detail/?id=393633&lang=en
(GMT+09:00 Seoul)
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