## Setting

Solve the equation

$$p \cdot e^{-x} + q \cdot \sin(x) + r \cdot \cos(x) + s \cdot \tan(x) + t \cdot x^2 + u = 0$$

where $$0 \leq 1$$.

## Input

Input consists of multiple test cases and is terminated by an EOF. Each test case consists of 6 integers in a single line: $$p, q, r, s, t, u$$ (where $$0 \leq p,r \leq 20$$ and $$-20 \leq q, s, t \leq 0$$). There will be a maximum of 2100 text cases.

## Output

For each test case, there should be a line containing the value of $$x$$, correct up to 4 decimal places, or the string No Solution, whicever is applicable.

## Sample Input

0 0 0 0 -2 1
1 0 0 0 -1 2
1 -1 1 -1 -1 1


## Sample Output

0.7071
No solution
0.7554


This is challenge 10341 of the ACM International Collegiate Programming Contest. Test input is provided by uDebug.