One day, mathematician and philosopher were engaged in a heated dispute.

Philosopher said:

• Ideal line has only length and no width, therefore, no line can have an area.
  Mathematician replied:
  
• That's as it may be, but still you can ll a square with a line in such a way that there will be no gaps.
  And you can't deny that a square has an area, and he grinned.
  But Philosopher still wasn't convinced:
  
• Show me this line, then.
  
• With pleasure... - responded Mathematician and scribbled some equations on a piece of paper:
  
  
• With t increasing, the point (x, y) will move around the square, forming a line.
  
• So what? - asked Philosopher. How is it going to ll the entire square?
  
• Indeed, it will, - said Mathematician, - Whichever point inside the square you draw, the line will eventually cross that point.
  
• No, - replied Philosopher indignantly, - Anyway, I don't believe. When will the line cross this point? - and he put a thick dot inside the square.
  Give Philosopher an answer.
  

Input

t – number of tests [t <= 150], than t test cases follows.
The first line of each test case contains the coordinates (x0, y0) of the dot center (-1 <= x0, y0 <= 1). The second line contains eps <= 0.0001 - the radius of the dot (the dot is essentially a small circle).

Output

For each test case output any value of t in the segment [0, 10^12], which corresponds to the line crossing the dot, or "FAIL", if the line doesn't cross the dot.

Example

Sample input:
1
0.744 0.554
0.01

Sample output:
5.3