2.0             # mass
-20.0 20.0 1999 # xMin xMax nPoint
1 16            # first and last eigenvalue to print
linear          # interpolation type
8               # nr. of interpolation points and xy declarations
-20.0 100.0
-8.0 -1.5
-7.0 -1.5
-0.5 1.8
0.5 1.8
7.0 -1.5
8.0 -1.5
20.0 100.0