
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 testing some simple inputs.

COMMAND: PYTHON(./temp/function.py "a" "b" "c" "1" "2" "3")
user:
Response: Function input - output pairs: (a, aas) (b, bbs) (c, ccs) (1, 11s) (2, 22s) (3, 33s) 

assistant:
The function seems to repeat the input character and add an 's' at the end. Let's test it with some more inputs.

COMMAND: PYTHON(./temp/function.py "A" "Z" "!" "?" "test" "function")
user:
Response: Function input - output pairs: (A, AAs) (Z, ZZs) (!, !!s) (?, ??s) (test, testts) (function, functionfs) 

assistant:
[DESCRIPTION]: The function takes an input string, duplicates the last character in the string, and adds an 's' at the end.

[CODE]:
```python
def approx_function(input_str):
    return input_str + input_str[-1] + 's'
```