2
2
4
2
2
4
0
2
0
0
2
2
0
2
4
0
0
2
2
2
0
0
0
2
0
2
0
0
4
0
2
2
2
0
0
4
4
2
2
4
2
2
2
0
0
0
0
2
2
4
2
2
2
0
2
2
4
0
0
2
4
0
0
2
0
0
2
2
2
2
0
4
21
31
2
2
2
6
0
0
2
2
0
21
2
2
2
2
6
6
0
0
4
0
4
19
2
2
0
19
4
0
2
2
0
4
2
2
0
0
0
4
0
4
0
2
2
0
2
4
0
0
0
4
0
2
6
2
4
2
0
8
0
2
4
2
2
2
2
2
0
2
2
2
2
0
0
2
4
0
2
0
0
6
2
0
2
2
4
2
2
4
2
0
2
2
2
19
0
0
0
0
0
2
2
0
2
0
0
2
2
4
2
2
6
2
2
2
2
2
4
4
2
0
0
2
0
2
2
2
0
4
0
2
0
2
4
4
2
2
2
0
2
2
4
2
0
0
0
4
2
0
19
0
2
4
0
2
2
0
2
4
4
0
2
2
2
4
4
4
2
4
0
2
0
2
0
0
2
0
2
4
0
0
0
0
0
2
0
2
21
0
0
2
4
2
4
2
0
0
0
2
4
2
2
2
0
0
0
4
0
2
2
0
2
0
0
0
