That is not nessesarily true (Bryan) about the right brain not being able to process #s and letters. If you remember your dreams you are talking in your dreams, talking is make up of sounds caused by letters (sounds desperate, I know).
According to this story about the lottery, it is reasonable to draw the conclusion that you do not think in just left and right sides, but you can also use both sides conjegated.
Basically, I think, his logic side was thinking lottery #s and his creative brain was generating the lottery numbers.
I try to abstain from calling it the 'sub'-consious, as do many people on this board, because it raises feelings of mystery and lack of control.
Peace Out