1
[(0, 3), (1, 3), (2, 3)]
{2: True}
==========
2
[(0, 2), (0, 3), (1, 3)]
{}
==========
3
[(0, 2), (0, 3), (1, 3), (2, 3)]
{2: True}
==========
4
[(0, 2), (0, 3), (1, 2), (1, 3)]
{2: True}
==========
5
[(0, 2), (0, 3), (1, 2), (1, 3), (2, 3)]
{2: True}
==========
6
[(0, 1), (0, 2), (0, 3), (1, 2), (1, 3), (2, 3)]
{2: True}
==========