MINOS 5.5: optimal solution found.
0 iterations, objective 0
Nonlin evals: constrs = 11, Jac = 10.
Objective = find a feasible point.
a = 2.60554
b = 2.78811
s = 2.41699
t = 1.80763
u = 2.01919
v = 2.22184
y = 1.34424
z = 1.58457