The function mostly returns "lclj" for input strings but occasionally returns different values for specific inputs. The exact pattern for the different outputs is unclear.

[CODE]:

```python
def approx_function(x):
    if x in ["banana", "python"]:
        return "dsc"
    elif x in ["orange", "lion"]:
        return "dfwjj"
    elif x == "elephant":
        return "okr"
    else:
        return "lclj"
```

Keep in mind that this approximation may not cover all the function's behavior, and there might be additional patterns not identified from the experiments.