0
8
0
10
0
10
3
12
0
13
0
15
0
15
3
18
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
20
0
6
