1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
3
7
7
8
9
9
A
B
B
B
C
C
C
D
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