#              - Palindrome Detector for strings of 0's and 1's
#              - A is Start State; Z is Accept State
0 1 _ r 1 #   - detect 1 - store as state B
0 0 _ r 2 #   - detect 0 - store as state C
0 _ _ r 3 #   - empty string - done! (even number) 
1 0 0 r 1 #   - go right
1 1 1 r 1 
1 _ _ l 4 #   - end of string detected - go back
2 0 0 r 2 #   - go right
2 1 1 r 2 
2 _ _ l 5 #   - end of string detected - go back
4 1 _ l 6 #   - found 1, cancel it, & go back 
4 _ _ l 3 #   -   or found blank - done! (odd number)
5 0 _ l 6 #   - found 0, cancel it & go back
5 _ _ l 3 #   -   or found blank - done! (odd number)
6 0 0 l 6 #   - go back 
6 1 1 l 6 
6 _ _ r 0 #   - beginning of string detected