1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
4
5
6
6
6
6
7
8
8
8
8
9
B
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