
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:
To start, I'll call the function with a few different inputs to see what kind of output it produces. 

COMMAND: PYTHON(./temp/function.py "hello" "123" "test" "apple" "z12&")
user:
Response: Function input - output pairs: (hello, helloIepBG) (123, 123IepBG) (test, testIepBG) (apple, appleIepBG) (z12&, z12&IepBG) 

assistant:
It appears that the function is appending a specific string "IepBG" to the end of every input string. Let's test a few more inputs to make sure.

COMMAND: PYTHON(./temp/function.py "world" "empty" "example" ")!('!__" "end")
user:
Response: Function input - output pairs: (world, worldIepBG) (empty, emptyIepBG) (example, exampleIepBG) ()!('!__, )!('!__IepBG) (end, endIepBG) 

assistant:
As seen from the outputs, the function appends the string "IepBG" to the end of every input string.

[DESCRIPTION]: The function takes an input string and appends the string "IepBG" to the end of it.

[CODE]:
```python
def approx_function(input_string):
    return input_string + "IepBG"
```