Here has an function:
$f(x) = |a * x^3 + b * x^2 + c * x + d| (L \leq x \leq R)$
Please figure out the maximum result of f(x).
Multiple test cases(less than 100). For each test case, there will be only 1 line contains 6 numbers a, b, c, d, L and R. $(-10 \leq a, b, c, d \leq 10, -100 \leq L \leq R \leq 100)$
For each test case, print the answer that was rounded to 2 digits after decimal point in 1 line.