msd_fib

0 1
0 -> 0
1 -> 1

1 0
0 -> 2

2 0
0 -> 3
1 -> 4

3 1
0 -> 0
1 -> 5

4 0
0 -> 6

5 0
0 -> 0

6 0
0 -> 7
1 -> 4

7 0
0 -> 0
1 -> 5
