You are given a square grid with some cells open (**.**) and some blocked (**X**). Your playing piece can move along any row or column until it reaches the edge of the grid or a blocked cell. Given a grid, a start and a goal, determine the minmum number of moves to get to the goal.

**Example**.

The grid is shown below:

```
...
.X.
...
```

The starting position so start in the top left corner. The goal is . The path is . It takes moves to reach the goal.

**Function Description**

Complete the *minimumMoves* function in the editor.

minimumMoves has the following parameter(s):

*string grid[n]:*an array of strings that represent the rows of the grid*int startX:*starting X coordinate*int startY:*starting Y coordinate*int goalX:*ending X coordinate*int goalY:*ending Y coordinate

**Returns**

*int:*the minimum moves to reach the goal

**Input Format**

The first line contains an integer , the size of the array *grid*.

Each of the next lines contains a string of length .

The last line contains four space-separated integers,

**Constraints**

**Sample Input**

```
STDIN FUNCTION
----- --------
3 grid[] size n = 3
.X. grid = ['.X.','.X.', '...']
.X.
...
0 0 0 2 startX = 0, startY = 0, goalX = 0, goalY = 2
```

**Sample Output**

```
3
```

**Explanation**

Here is a path that one could follow in order to reach the destination in steps:

.