input: [Description] The perpendicular distance of a package from the idealized line A + I = 1. This metric is an indicator of the package's balance between abstractness and stability. A package squarely on the main sequence is optimally balanced with respect to its abstractness and stability. Ideal packages are either completely abstract and stable (x=0, y=1) or completely concrete and instable (x=1, y=0). The range for this metric is 0 to 1, with D=0 indicating a package that is coincident with the main sequence and D=1 indicating a package that is as far from the main sequence as possible. [Term] 
output: Distance
options: N u m b e r o f C l a s s e s
options: A f f e r e n t C o u p l i n g s
options: E f f e r e n t C o u p l i n g s
options: A b s t r a c t n e s s
options: I n s t a b i l i t y
options: D i s t a n c e
options: C y c l e s