reset;
mass 0-m 0 100 -4.000000 0;
mass 0-m 1 100 -3.750000 0;
mass 0-m 1 100 -3.500000 0;
mass 0-m 1 100 -3.250000 0;
mass 0-m 1 100 -3.000000 0;
mass 0-m 1 100 -2.750000 0;
mass 0-m 1 100 -2.500000 0;
mass 0-m 1 100 -2.250000 0;
mass 0-m 1 100 -2.000000 0;
mass 0-m 1 100 -1.750000 0;
mass 0-m 1 100 -1.500000 0;
mass 0-m 1 100 -1.250000 0;
mass 0-m 1 100 -1.000000 0;
mass 0-m 1 100 -0.750000 0;
mass 0-m 1 100 -0.500000 0;
mass 0-m 1 100 -0.250000 0;
mass 0-m 1 100 0.000000 0;
mass 0-m 1 100 0.250000 0;
mass 0-m 1 100 0.500000 0;
mass 0-m 1 100 0.750000 0;
mass 0-m 1 100 1.000000 0;
mass 0-m 1 100 1.250000 0;
mass 0-m 1 100 1.500000 0;
mass 0-m 1 100 1.750000 0;
mass 0-m 1 100 2.000000 0;
mass 0-m 1 100 2.250000 0;
mass 0-m 1 100 2.500000 0;
mass 0-m 1 100 2.750000 0;
mass 0-m 1 100 3.000000 0;
mass 0-m 1 100 3.250000 0;
mass 0-m 1 100 3.500000 0;
mass 0-m 0 100 3.750000 0;
link 0-l 30 31 10 2.5 1 0 1e+10;
link 0-l 29 30 10 2.5 1 0 1e+10;
link 0-l 28 29 10 2.5 1 0 1e+10;
link 0-l 27 28 10 2.5 1 0 1e+10;
link 0-l 26 27 10 2.5 1 0 1e+10;
link 0-l 25 26 10 2.5 1 0 1e+10;
link 0-l 24 25 10 2.5 1 0 1e+10;
link 0-l 23 24 10 2.5 1 0 1e+10;
link 0-l 22 23 10 2.5 1 0 1e+10;
link 0-l 21 22 10 2.5 1 0 1e+10;
link 0-l 20 21 10 2.5 1 0 1e+10;
link 0-l 19 20 10 2.5 1 0 1e+10;
link 0-l 18 19 10 2.5 1 0 1e+10;
link 0-l 17 18 10 2.5 1 0 1e+10;
link 0-l 16 17 10 2.5 1 0 1e+10;
link 0-l 15 16 10 2.5 1 0 1e+10;
link 0-l 14 15 10 2.5 1 0 1e+10;
link 0-l 13 14 10 2.5 1 0 1e+10;
link 0-l 12 13 10 2.5 1 0 1e+10;
link 0-l 11 12 10 2.5 1 0 1e+10;
link 0-l 10 11 10 2.5 1 0 1e+10;
link 0-l 9 10 10 2.5 1 0 1e+10;
link 0-l 8 9 10 2.5 1 0 1e+10;
link 0-l 7 8 10 2.5 1 0 1e+10;
link 0-l 6 7 10 2.5 1 0 1e+10;
link 0-l 5 6 10 2.5 1 0 1e+10;
link 0-l 4 5 10 2.5 1 0 1e+10;
link 0-l 3 4 10 2.5 1 0 1e+10;
link 0-l 2 3 10 2.5 1 0 1e+10;
link 0-l 1 2 10 2.5 1 0 1e+10;
link 0-l 0 1 10 2.5 1 0 1e+10;
Xmin -4;
Xmax 4;
Ymin -2;
Ymax 2;
setL 0-l 0;