It wasn't easy -- not by a long shot. And when I reached 12, then 16, then, at last, 20 words, my brain actually did hurt. Well, it didn't hurt, exactly. But I could, somehow, feel it stretch and strain, and when I was done with the exercise, it felt tired, like my legs do after a long walk. It hadn't felt that way in a long time -- as long as I could remember, perhaps ironically. I kind of liked the feeling.