1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
6
8
9
C
D
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