1, 0.5, -1, -3
3, 0.5, -1, -3
5, 0.5, -1, -3
7, 0.5, -1, -3
9, 0.5, -1, -3
11, 0.5, -1, -3
13, 0.5, -1, -3
15, 0.5, -1, -3
17, 0.5, -1, -3
19, 0.5, -1, -3