Please solve the programming task below using a self-contained code snippet in a markdown code block.

You are given a string moves of length n consisting only of characters 'L', 'R', and '_'. The string represents your movement on a number line starting from the origin 0.
In the ith move, you can choose one of the following directions:

move to the left if moves[i] = 'L' or moves[i] = '_'
move to the right if moves[i] = 'R' or moves[i] = '_'

Return the distance from the origin of the furthest point you can get to after n moves.
 
Please complete the following python code precisely:
```python
class Solution:
    def furthestDistanceFromOrigin(self, moves: str) -> int:
```