; spline s -b -iy i      ss13
; points along a symmetric curve
       0.414417             1.3
       0.778826             1.7
        1.25446             2.4
        1.92385             3.8
         2.2703             4.8
        2.38799             5.2
        2.87344             7.3
        3.03379             8.2 " "
        8.58558             1.3
        8.22117             1.7
        7.74554             2.4
        7.07615             3.8
         6.7297             4.8
        6.61201             5.2
        6.12656             7.3
        5.96621             8.2 ""
