msd_4 msd_2

0 0
0 0 -> 0
0 1 -> 1
1 0 -> 2
1 1 -> 3
2 0 -> 0
2 1 -> 1
3 0 -> 4
3 1 -> 5

1 1
3 0 -> 1

2 1
2 1 -> 6
3 0 -> 2
3 1 -> 3

3 0 
0 0 -> 0
0 1 -> 1
1 0 -> 2
1 1 -> 3
2 0 -> 7

4 0
0 1 -> 6
1 0 -> 4
1 1 -> 5

5 0
0 0 -> 7
1 0 -> 1
2 0 -> 0
2 1 -> 1
3 0 -> 4
3 1 -> 5

6 1
0 1 -> 6
1 0 -> 4
1 1 -> 5
2 1 -> 6
3 0 -> 2
3 1 -> 3

7 0
0 0 -> 7
1 0 -> 1
2 0 -> 7