A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
[
From:http://tw.wingwit.com/Article/program/sjjg/201311/22689.html
A
B
C
D
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B
C
D
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B
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D
A
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C
D
A
B
C
D
A
B
C
D
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B
C
D
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D
[