0, 69
2, 50
4, 142
4.3, 142,
4.7, 142,
5, 142,
6, 188
8, 73
10, 100
-9999., 0,
The preceding software end-of-file requires only that X = -9999.
Nothing following this will be read by ATP,  so comments can be
placed here without difficulty.  About the (X,Y) characteristic,
note that points 4 and 5 have been added compared with subcase 11.
They are redundant,  and will be discarded upon input.