1
1
1
1
1
1
1
1
1
1
1
1
1
3
5
5
6
6
6
9
D
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
F