
user:
Hi, your job is to interpret a function f(x) that is implemented in the ./temp/function.py script. f(x) takes string inputs.
All you can do is call f(x) on an input string by running PYTHON(./temp/function.py string). 
Try to describe the function implemented by f(x) by running experiments on it. 
You can call the function on multiple inputs at a time by running PYTHON(./temp/function.py string1 string2 string3 ...). 
We encourage testing a large range of inputs before writing a description.
The goal is to find a good simple description of f(x) that explains most of the function behavior. f(x) may combine multiple different operations.
Your description of the function should be in the following form.
[DESCRIPTION]: Describe what the function is doing in language. 
[CODE]: Write python code that approximates the behavior of the function. 
assistant:
Alright, let's start by running some experiments on the function with different inputs. I'll start with some common strings.

COMMAND: PYTHON(./temp/function.py "hello" "world" "python" "experiment" "test")
user:
Response: Function input - output pairs: (hello, hllll) (world, wrrld) (python, pythhn) (experiment, ixpirimint) (test, tsst) 

assistant:
Interesting. Let's try some more inputs, including uppercase letters, numbers, and special characters.

COMMAND: PYTHON(./temp/function.py "HELLO" "12345" "!@#$%")
user:
Response: Function input - output pairs: (HELLO, yLLLL) (12345, 12345) (!@#$%, !@#$%) 

assistant:
Thank you for the output. Now let's test the function on some shorter and longer strings, as well as strings with a mix of different characters.

COMMAND: PYTHON(./temp/function.py "a" "ab" "ABC123!$" "This is a test." "XqE&v7r")
user:
Response: Function input - output pairs: (a, a) (ab, bb) (ABC123!$, 2BC123!$) (This is a test., Th s  s   t st.) (XqE&v7r, Xq&&v7r) 

assistant:
Based on the experiments, I observe the following behavior:
- The function seems to duplicate any vowel in the input string, except the first character in the string regardless if it's a vowel or not.
- The function ignores the case of the letters.
- The function preserves digits and special characters in their original form.

Here is the description and an approximation of the function behavior:

[DESCRIPTION]: The function takes an input string and returns a new string where vowels (not including the first character) are duplicated.

[CODE_PART]: 
```python
def approx_f(x):
    vowels = 'aeiouAEIOU'

    def duplicate_vowels(char, index):
        if char in vowels and index != 0:
            return char * 2
        return char

    return ''.join(duplicate_vowels(char, index) for index, char in enumerate(x))
```
