1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
5
5
7
8
A
B
D
D
D
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