Giải bài trực tuyến

You are given three triangle houses. Each house is presented by three points in the 2D coordination. Houses do not overlap but can share points on their border.

You stay at point (sx, sy) and want to reach (ex, ey) by a shortest path. Your path can not intersect with a house but you can go a long a house’s border. However, you can not “go through” the walls as follow (just an example, please use natural meaning):

You are to write a program to print the length of the shortest path.

Input

The input begins with T – number of test cases. For each test case:

• The first line of each test case consists of sx, sy, ex, ey.
• In next three lines, each line consists of 6 numbers x1, y1, x2, y2, x3, y3 denote coordinates of a house.

Output

For each test case, print the length of the shortest path with exactly 5 decimal places.

Limits

T ≤ 20
The absolute values of coordinates are less than 1000.

Example

Input:
1
0 0 3 0
1 0 2 0 1 1
2 0 2 -1 3 -1
2 1 3 1 2 2

Output:
3.65028