extract block list

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
fix file description

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
block to calculate fuzzy logical D()

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
block to calculate fuzzy logical S()

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>