Distance from a point to a line
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The distance from a point to a line is defined as the distance from the point 
to the line along the perpendicular to the line.  (This is the shortest 
distance between the point and any point on the line.)  The formula for this 
distance from a point (x_1,y_1) to a line described by the equation 
Ax + By + C = 0 is given by (A*x_1 + B*y_1 +C)/sqrt(A*A + B*B).  Note that 
this quantity is signed and its absolute value gives the distance. The sign 
gives useful information as well -- it is positive for points on one side of 
the line and negative for points on the other side.

In this problem you will compute the distance of points from lines and output 
the distance rounded to 2 decimal points.  

Input

The first line is the number of instances n. Each following line contains 5 
integers x_1, y_1, A, B, C, separated by spaces. All integers will have 
absolute values less than 5000.

Output 

The absolute value of the distance between each point and the corresponding 
line rounded to 2 decimal places.

Sample input

1
0 0 -1 1 0

Sample Output

Case 1: The distance is 0.00.