RScheme 0.7.3.4-b3u

From the RScheme web page:

RScheme is an open-source (and freely redistributable) implementation of the Scheme language with lots of extensions and additional features beyond the core language.

To reproduce my results on Ubuntu Gutsy Gibbon, install RScheme with

sudo apt-get install rscheme

and run the interpreter with

rs -q 2>&1

RScheme makes the following choices: