clean
the
table
O
B
B
B
N
O
B
I
I
O
I
B
N
G
N
G
O
G
I
G
O
N
G
I
Size:
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Start
O
History
Start
O
B
B
B
N
O
B
I
I
O
I
B
N
G
N
G
O
G
I
G
O
N
G
I
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