20	2
1	x1	x1	0	8	3	99999	
2	y	y	0	8	3	99999	
0	x1	y	
1	0.398	2.310	
2	-1.197	-3.130	
3	-0.486	-1.950	
4	-1.908	-2.260	
5	-0.841	-2.790	
6	-0.301	-1.320	
7	0.696	4.440	
8	1.116	8.080	
9	0.479	2.860	
10	1.099	7.920	
11	-0.944	-2.940	
12	-0.218	-0.990	
13	0.810	5.370	
14	-0.062	-0.310	
15	0.672	4.260	
16	-0.019	-0.100	
17	0.001	0.010	
18	0.016	0.080	
19	1.199	8.880	
20	0.980	6.820	
