Data from Chen and Tang (1998)	readme.txt contains some explanations of the data set.
Paired-Difference Mechanism	331wb, 331wr, 401wb, 401wr, 508wb, 508wr, 508wy
Basic Quadratic Mechanism (BQ1)	404glib, 404glir, 405glib, 405glir, 506glib, 506glir, 506gliy
Basic Quadratic Mechanism (BQ100)	408glcb, 405glcr, 406glcb, 406glcr, 507glcb, 507glcr, 507glcy