1
1
1
1
1
1
1
1
2
2
2
3
3
3
4
4
6
6
9
9
9
D
D
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
F