Lesson 1: bcbdc adbac cc
Lesson 2: cdcca bbadc db
Lesson 3: cacac bccba bb
Lesson 4: dbabb acbca cc
Lesson 5: cadbc dabcb bd
Lesson 6: dacdd adaba da
Lesson 7: bccda cdacb ab
Lesson 8: dbbac cbbad bb
Lesson 9: cbdaa bbdbb dc
Lesson 10: addcb cacac ca
Lesson 11: bbbab ccacc bd
Lesson 12: ccadd adacd aa
Lesson : 13 bdbca bbcaa ad
Lesson 14: bcacd bcbcb bb
Lesson 15: dbcbc dadcc cb
Lesson 16: aadab adadd da
Lesson 17: dbbdc cbaac ad
Lesson18 : Bdbdb cdcac cb
Lesson 19: Adccd bcbca cc
Lesson 20: Bcbbc bcacc da
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