你看看这个, (后面还有, 字数不够, 请再问)
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
Lesson 21 : cdcda cbbad cc
Lesson 22: dbddb dacda bb
Lesson 23: aaacc addbb ad
Lesson 24: baaca acccb ab
Lesson 25: cbbab cdbaa da
Lesson 26: adcbc ddabd bd
Lesson 27: dcddd baddc cc
Lesson 28: cdbbc dbdcd ba
Lesson 29: bccbd babbb cb
Lesson 30: aadab cccda dd
