1
1
1
1
1
1
1
1
2
3
3
3
3
8
9
9
A
B
B
B
C
D
E
E
E
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F