9
stream
4
1
0
1
0
0
0
1
0
0
0
2
2
0
6
0
0
1
1
5
3
0
1
0
2
1
2
0
2
0
1
1
1
6
1
2
0
0
0
0
0
2
0
0
0
0
1
4
2
