| #[(9, false), (8, true), (7, false), (6, true), (5, false), (4, true), (3, false), (2, true), (1, false), (0, true)] | |
| >> 0 ==> (some (0, true)) | |
| >> 1 ==> (some (1, false)) | |
| >> 2 ==> (some (2, true)) | |
| >> 3 ==> (some (3, false)) | |
| >> 4 ==> (some (4, true)) | |
| >> 5 ==> (some (5, false)) | |
| >> 6 ==> (some (6, true)) | |
| >> 7 ==> (some (7, false)) | |
| >> 8 ==> (some (8, true)) | |
| >> 9 ==> (some (9, false)) | |
| >> 10 ==> none | |
| >> 11 ==> none | |
| >> 12 ==> none | |
| >> 13 ==> none | |
| >> 14 ==> none | |
| >> 15 ==> none | |
| >> 16 ==> none | |
| >> 17 ==> none | |
| >> 18 ==> none | |
| >> 19 ==> none |