2014
02-27

# Two Mirrors

Nomad wants to know why girls like using mirrors. So he bought one, but it’s not a normal one. The mirror is made up of two normal mirrors, which are connected at a point (x2, y2). So it is said, two mirrors can be described as two line segment. (x1, y1) (x2, y2) and (x2, y2) (x3, y3). And Nomad is at the point (x0, y0). And he is amazing to see that there are many Nomads in the special mirror. The Kth Nomad is described as the picture below. (Mirror face is always on the side of the smaller angle, and three point of mirror are never in a line.)

The first Nomad is always in mirror(x1,y1)(x2,y2);
The second Nomad is always in mirror(x2,y2)(x3,y3);
The third Nomad is always in mirror(x1,y1)(x2,y2);
The 4th Nomad is always in mirror(x2,y2)(x3,y3);

There are multiple cases. For each test case, Nine numbers, x0, y0, x1, y1, x2, y2, x3, y3 and a integer K.(1 ≤ K ≤ 1000)

There are multiple cases. For each test case, Nine numbers, x0, y0, x1, y1, x2, y2, x3, y3 and a integer K.(1 ≤ K ≤ 1000)

0.0 0.0
-4.0 0
0.0 20.0
4.0 0
1
0.0 0.0
-4.0 0
0.0 20.0
4.0 0
2

-7.6923 1.5385
14.2012 5.9172

Hint
Hints: Maybe Kth Nomad is reflected by one mirror but you see Nomad in another mirror, then you should print "You can't see me!" (No quote).


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