**Descri****ption****:**

Today, Subaba is doing experiments, he is observing overlap of two cells. Now, your task is to find out these the situation of two cells touching the nutrient solution.

To simplify the question, we take cell as a circle.

Input one row ,in which has 6 floating-point numbers, x1, y1, r1, x2, y2, r2 ( -1000000<=x1, y1, r1, x2, y2, r2<=1000000 )，indicate the coordinate of circle center and radius of cell separately.

The answer accurate to 2 decimal.

```
-1 0 2 1 0 2
-2 0 2 2 0 2
1 1 1 1 1 1
```

```
16.76
25.13
6.28
```

Π = 3.1415926535898