msd_fib

0 1
0 -> 0
1 -> 1

1 0
0 -> 2

2 1
0 -> 3

3 0
0 -> 4

4 0
0 -> 5

5 0
0 -> 6
1 -> 7

6 0
1 -> 8

7 1
0 -> 9

8 0
0 -> 10

9 0
0 -> 11
1 -> 12

10 1
0 -> 8
1 -> 1

11 0
1 -> 3

12 1
