0, 0, 0.
0, 0, 1.
1, 0, 0.
2, 0, 0.
3, 0, 0.
3, 0, 1.
0, 1, 0.
3, 1, 0.
3, 1, 1.
0, 2, 0.
2, 2, 3.
3, 2, 0.
3, 2, 1.
3, 2, 2.
3, 2, 3.
0, 3, 0.
0, 3, 1.
1, 3, 0.
1, 3, 1.
2, 3, 0.
2, 3, 1.
2, 3, 2.
2, 3, 3.
3, 3, 0.
3, 3, 1.
3, 3, 2.
3, 3, 3.