A
A A
A A
A
A A
A A
A
A A
A
A A
A A
A
A A
A A
A A
A
A
A A
A A
A A
A B
B B
B B
0
0
0
0
0
0 1 2 3 4
0 1 2
0 1 2
0 1 2
0
0
0
0
0
0
B
B B
B B
B
B B
B
B B
B B
B
B B
B B
B B
B
B
B B
B B
B B
B
E E
E F
E E E E
E
E F
E
E F
D D
D D
D
D D
D D
D
D
D D
D C
C C
C C
1
1
1
1
1
1
1
1
1
1
1
C
C C
C C
C
C C
C
C C
C C
C
C C
C C
C C
C
C
C C
C C
C C
C