8
2
2
2
2
1
2
1
3
2
2
1
5
1
1
1
4
1
1
1
4
1
1
1
2
4
1
1
1
2
4
1
1
2
4
1
1
4
1
1
4
2
1
7
2
1
3
4
2
2
2
8
1
9
2
2
2
2
2
2
1
11
1
1
1
2
3
2
3
3
3
1
2
2
1
1
11
1
2
9
2
13
11
1
2
2
4
2
1
Robot Vacuum Cleaner