1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
3
3
5
6
7
8
9
9
B
C
C
E
E
E
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