2
0
4
0
2
4
4
0
4
4
0
4
2
0
4
4
0
0
2
0
0
0
4
0
2
6
2
4
0
0
2
2
0
2
2
0
0
0
0
2
0
0
0
0
2
4
4
17
0
6
0
4
2
4
2
4
4
6
2
2
21
2
4
2
2
2
0
2
2
0
19
2
4
0
2
2
2
2
2
2
2
2
2
2
2
2
4
2
0
4
0
2
2
4
0
4
2
2
4
0
2
2
0
4
6
0
6
21
4
2
2
2
4
2
0
0
2
2
4
2
4
4
4
4
6
0
4
2
0
10
2
2
2
4
2
4
4
0
0
0
2
2
4
4
0
2
0
0
0
4
2
0
2
0
4
2
21
2
0
2
2
2
2
0
2
2
2
0
4
2
0
0
2
0
4
0
4
4
4
2
4
2
4
4
0
2
2
2
0
2
2
0
0
6
2
2
4
2
2
0
0
0
2
2
0
2
4
0
0
2
2
2
0
2
0
0
4
19
2
0
0
0
0
0
0
0
4
2
0
2
4
4
0
0
2
2
0
0
2
4
2
2
0
2
2
0
2
0
2
4
2
2
0
2
2
0
2
0
4
0
2
0
2
0
2
0
0
2
0
0
0
2
0
0
0
2
4
0
0
0
2
2
31
21
2
0
4
2
