Given the coordinates of 3 points

, you are asked to calculate the perimeter of the triangle formed by those points. The perimeter is the sum of all the sides of the triangle.The 3 lines of the input contain 3 coordinates - each

`x`

and `y`

component on a single line.The program should output a single line - the perimeter of the triangle formed by those coordinates.

```
Input
0 0
1 0
0 1
Output
3.41421356237
```

## Tip

You can define a function to compute the distance between two coordinates.