title
Equal Number of a's and b's

description
Accepts strings that contain an equal
number of a's and b's.

vertices
0 L 0.1 0.5
1 R 0.35 0.5
2 R 0.6 0.2
3 R 0.6 0.8
4 Y 0.6 0.5
5 N 0.85 0.5

edges
0 1 # #
1 2 a X
1 3 b X
1 4 # #
2 0 b X
2 5 # #
3 0 a X
3 5 # #

tapes
[a] b b b a a 
[b] a b a a b
[a] a b b a a b
[b] a a a b