In the first line there is an integer T, indicates the number of test cases. (T <= 10)
In each case, the first line contains three floating numbers x0, y0, r0, indicating the coordinate and the radius of “T1” ; Then one line contains three floating numbers x1, y1, r1, indicating the coordinate and the radius of “T2” ; You may assume that “T1” and “T2” are non-intersect.
For every test case, output one line.First output “Case idx: ”, here idx is the case number start from 1.Then output the minimum area of the region ,rounded to 3 digits after the decimal point.