1
1
1
1
1
1
3
7
8
8
9
9
9
9
9
A
B
B
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