An
"Icebreaker"
is used
B
N
B
G
N
G
O
O
O
I
G
N
B
I
B
O
N
B
G
G
O
I
I
I
Size:
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Start
B
History
Start
B
N
B
G
N
G
O
O
O
I
G
N
B
I
B
O
N
B
G
G
O
I
I
I
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