# Falling Cards

Time Limit: 1 Second Memory Limit: 32768 KB

It is hard to make the playing card stand on its edge, however, some patient person managed to put N of them upon the desk in such a way that each cards stands on its shorter edge. The top-down view of that desk with cards upon it can be represented with the set of line segments with coordinates (xi, yi) to (vi, wi). The segments do not intersect.

The first card falls flat on its side, causing any card it touches to fall down also. The angle between vector (x1, y1) - (v1, w1) and the falling direction of the first card is equal to 90 degrees (measured counter-clockwise). If card A touches card B, the direction of B's fall is chosen so that the continuation of the direction vector does not cross the line containing segment A. Input data are guaranteed to never contain:

1) a card falling exactly perpendicular to the other and

2) a falling card that touches more than one of still standing cards.

Your program must determine which cards will fall, and which shall remain standing.

## Input

The first line of input contains numbers N H (1 <= N <= 100, H > 0) - the number of cards and the floating point height of a card. Each of the following N lines contains four floating-point numbers xi yi vi wi - coordinates of cards separated by spaces.

## Output

The output must contain the list of fallen cards' numbers, sorted in increasing order and separated by spaces.

**This problem contains multiple test cases!**

The first line of a multiple input is an integer N, then a blank line followed by N input blocks. Each input block is in the format indicated in the problem description. There is a blank line between input blocks.

The output format consists of N output blocks. There is a blank line between
output blocks.

## Sample Input

1 3 100 10 10 50 40 10 0 50 30 20 90 20 20

## Sample Output

1 3Submit

Source: Northeastern Europe 2002, Far-Eastern Subregion