I have alphabeth {000, 001, 010, 011, 100, 101, 110, 111}
There is a langugage L. Strings that belong in this langugage only when 1-st bitrow + 2nd bitrow = 3-rd bitrow
For example: a 3 letter word "001100110" belongs in the language cause if to look them in rows:
011
001
100
011 +...