1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
5
6
6
6
8
8
8
8
8
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