0
1
2
3
4
5
6
7
8
9
10
0
(0,10) (0,10) < Counter Object: (0,10) >
-1 9 -1
thirty

[0, 1, 2, 3, 4, 5]
15
0
(0,5)
< Counter Object: (0,5) >
5
-1
hello