As I explained to a friend recently, I'm not the type of person who can readily do the calc in my head, but rather the type who would enjoy the tedious work of

As I explained to a friend recently, I'm not the type of person who can readily do the calc in my head, but rather the type who would enjoy the tedious work of laying out all the possibilities on paper, as I did with the Periodic Calendar: http://periodiccalendar.com/ http://periodiccalendar.com/