BEFORE

A1

AFTER

A2

BEFORE

B1

AFTER

B2

BEFORE

C1

AFTER

C2

BEFORE

D1

AFTER

D2

BEFORE

E1

AFTER

E2

BEFORE

F1

AFTER

F2

BEFORE

G1

AFTER

G2

BEFORE

H1

AFTER

H2

BEFORE

I1

AFTER

I2