customer
walks in
for service
N
N
O
N
I
B
B
B
I
N
I
O
G
G
I
B
O
G
B
O
I
G
O
G
Size:
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Start
N
History
Start
N
N
O
N
I
B
B
B
I
N
I
O
G
G
I
B
O
G
B
O
I
G
O
G
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