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
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
Lesson 31: dbaca adabc ac
Lesson 32: cccbb cadad bc
Lesson 33: dbdac bbccc ac
Lesson 34: dabca dcbcb ca
Lesson 35: adadd adaba dd
Lesson 36: addcd ccbad cc
Lesson 37: cbbbb dacdb ba
Lesson 38: bcaac bddba dd
Lesson 39: dacdd abacc ab
Lesson 40: ccbca acbbb bd
Lesson 41: aacdc bbada cb
Lesson 42: dddbb cddac da
Lesson 43: bbaad daccd ac
Lesson 44: cbccc bdaba bd
Lesson 45: bdabb dcbcb db
Lesson 46: acdda cbcad ca
Lesson 47: dabad aaddc ac
Lesson 48: cbcba cbbda bc
Lesson 49: dabab ccacc aa
Lesson 50: dbacc aadbb cd
Lesson 51: bcddd adcad db
Lesson 52: bccab dcbac bd
Lesson 53: cdacc cdcda cc
Lesson 54: dbdbd badcb dd
Lesson 55: aabda acabd ab
Lesson 56: cacca cabbc cc
Lesson 57: abbbb dcdcb da
Lesson 58: bdaac bdcad bd
Lesson 59: dbddd abada ab
Lesson 60: bacbc babac ad
Lesson 61: bacca dcabb dd
Lesson 62: addcd ccbda db
Lesson 63: dbaab ddacd ca
Lesson 64: ccccb bccab bb
Lesson 65: adbbc aadcc bd
Lesson 66: cbaad aabab ba
Lesson 67: daddd dbbad dd
Lesson 68: bbcdb bbccc aa
Lesson 69: abcbb ddaab cd
Lesson 70: dbccd bcacd dc
Lesson 71: bdbbc cdbbc ba
Lesson 72: acadb accdb ad
Lesson 73: cadac dadaa db
Lesson 74: baccd cacbc ab
Lesson 75: cabdb abbdd cc
Lesson 76: dbdaa bbacb dd
Lesson 77: acabc dddaa ba
Lesson 78: acbbc acbab ca
Lesson 79: bdcca dbada ac
Lesson 80: cbdad cadcc db
Lesson 81: daadb bdcbd bd
Lesson 82: abadc cdaac bd
Lesson 83: bacca bcbcd ab
Lesson 84: ccabd cccda cd
Lesson 85: ddbab abdbb dc
Lesson 86: bcabb bdcab bc
Lesson 87: cdcda ccada ad
Lesson 88: cbbcc abbcc cb
Lesson 89: aadad dadbd db
Lesson 90: bccca bcbad dd
Lesson 91: dbcbc dbbcb cb
Lesson 92: bcdcb abbad ca
Lesson 93: cdbac ccdcb db
Lesson 94: abcba dacda bc
Lesson 95: dabad cdcac dc
Lesson 96: dccba dcdab cb
参考资料：http://hi.baidu.com/%C4%C8%C4%C8107/blog/item/3050fd0f359040efaa645709.html