Walk
for 20
minutes
O
B
O
I
N
O
G
I
N
B
O
I
I
G
B
B
G
O
N
G
I
N
G
B
Size:
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Start
O
History
Start
O
B
O
I
N
O
G
I
N
B
O
I
I
G
B
B
G
O
N
G
I
N
G
B
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