Difficulty
Concentrating
G
I
N
I
G
I
B
B
O
O
O
I
O
I
B
B
B
G
O
G
N
G
N
N
Size:
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Start
G
History
Start
G
I
N
I
G
I
B
B
O
O
O
I
O
I
B
B
B
G
O
G
N
G
N
N
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