2.
2.
A F
B G
C H
*
D
E
A F
B G
C
H
*
D
E
BH
2.
2.
A
B
C
D *
E
G
H
ECRAN
A
B
C
0 *
D
E
F
G
H
l
2.
�
A
B
C
D
E
F
o G
H
*
.
-
1
