Practice
receiving
from
others
O
G
I
I
B
N
G
I
N
N
N
O
O
G
B
N
I
G
B
O
B
O
I
I
N
G
B
O
B
G
Size:
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Start
O
History
Start
O
G
I
I
B
N
G
I
N
N
N
O
O
G
B
N
I
G
B
O
B
O
I
I
N
G
B
O
B
G
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