I have a dictionary and a list of values such as:

```py
dictionary = {'a': 1, 'b': 2, 'c': 3, 'd': 4}

liste = [2, 3]

```

I would like:

```py
result = ['b', 'c']

```

If I have a **very large** dictionary, what is the most optimal way to do this?

The keys have unique values.