6 + 3 = 3 + _ = _ | 6 + _ = 4 + _ = _ |
4 + 1 = 1 + _ = _
| 6 + 3 = 3 + _ = _ |
6 + 3 = 3 + _ = _ | 6 + _ = 4 + _ = _ |
6 + _ = 4 + _ = _ | 4 + 1 = 1 + _ = _
|
6 + 3 = 3 + _ = _ | 6 + _ = 4 + _ = _ |
4 + 1 = 1 + _ = _
| 6 + 3 = 3 + _ = _ |
6 + 3 = 3 + _ = _ | 6 + _ = 4 + _ = _ |
6 + _ = 4 + _ = _ | 4 + 1 = 1 + _ = _
|