    This program is a port (more or less) of a C++ program that finds all
solutions to the well-known pentominos puzzle. This puzzle contains the 12
different arrangements of 5 connected squares, and the goal is to fit them
all in a 6 x 10 rectangle.
    In the process of porting the program I found that Sather iterators
have a lot of slick possibilities; I might have been able to collapse the
loops a little more if I study the code longer, but I don't have time.
    The performance of the Sather version was a little worse than the C++
version (about 8%) but it was competitive.

-sheldon white-  :^/

sheldon@amc.com