# if x1= 9 then x1= sqrt(2)
x1 x2 y
-1 -1 43
 1 -1 78
-1  1 69
 1  1 73
-9  0 48
 9  0 76
 0 -9 65
 0  9 74
 0  0 76
 0  0 79
 0  0 83
 0  0 81