2 Lines Esay Solution...
Code

# Code
```python3 []
class Solution:
    def furthestDistanceFromOrigin(self, moves: str) -> int:
        
        left_count, right_count, dash_count = map(moves.count, ['L', 'R', '_'])

        return max(left_count + dash_count - right_count, right_count + dash_count - left_count)
```
['Python3']