The program is just a quick-n-dirty script to do a bit of random swapping. Its playing a game called "alfabetsoep" which was published in a Dutch programming magazine Luminis Conversing Worlds juli 2013 nr. 8.
When it runs, it does some random swaps on the alphabet. Its unlikely to make any improvements for a while, so after 1 minute it tries another starting shuffle. And it prints a log line, which shows how many random swaps it has evaluated.
On my Macbook 2.7Ghz i7 it manages just over 3000 swaps per minute using CPython 2.7.
Using pypy-2.3-osx64 it manages only 1000 swaps per minute.