1
1
1
1
5
5
5
7
8
8
8
9
C
D
D
D
D
D
D
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
F
F
F
F
F
F
F
F
F
F