In this Kata, you will remove the left-most duplicates from a list of integers and return the result.
```python
# Remove the 3's at indices 0 and 3
# followed by removing a 4 at index 1
solve([3, 4, 4, 3, 6, 3]) # => [4, 6, 3]
```
More examples can be found in the test cases. 
Good luck!
from collections import OrderedDict

def solve (arr):
    arr = arr[::-1]
    arr = list(OrderedDict.fromkeys(arr))[::-1]
    return arr
from collections import OrderedDict

def solve (arr):
    arr = arr[::-1]
    arr = list(OrderedDict.fromkeys(arr))[::-1]
    return arr