msd_2
0 1
0 -> 0 
1 -> 1 

1 1
0 -> 2 
1 -> 3 

2 0
0 -> 4 
1 -> 5 

3 1
0 -> 6 
1 -> 7 

4 0
0 -> 8 
1 -> 9 

5 0
0 -> 10 
1 -> 11 

6 1
0 -> 12 
1 -> 7 

7 1
0 -> 8 
1 -> 9 

8 0
0 -> 13 
1 -> 14 

9 0
0 -> 15 
1 -> 1 

10 0
0 -> 2 
1 -> 16 

11 1
0 -> 7 
1 -> 17 

12 1
0 -> 6 
1 -> 4 

13 1
0 -> 2 
1 -> 16 

14 1
0 -> 18 
1 -> 19 

15 0
0 -> 0 
1 -> 1 

16 0
0 -> 6 
1 -> 7 

17 1
0 -> 10 
1 -> 11 

18 0
0 -> 20 
1 -> 9 

19 1
0 -> 10 
1 -> 21 

20 1
0 -> 13 
1 -> 14 

21 0
0 -> 18 
1 -> 19