
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:
Great, let's start by running a few basic tests to get an idea of what the function does.

COMMAND: PYTHON(./temp/function.py "hello" "world" "test" "123" "example")
user:
Response: Function input - output pairs: (hello, helloMU) (world, worldMU) (test, testMU) (123, 123MU) (example, exampleMU) 

assistant:
It seems that the function adds "MU" to the end of the input string. Let's run a few more tests to confirm this behavior.

COMMAND: PYTHON(./temp/function.py "abc" "def" "empty" " " "!@#")
user:
Response: Function input - output pairs: (abc, abcMU) (def, defMU) (empty, emptyMU) ( ,  MU) (!@#, !@#MU) 

assistant:
Based on the test results, we can summarize the function as follows:

[DESCRIPTION]: The function appends the string "MU" to the end of the input string.

[CODE]:
```python
def f(x):
    return x + "MU"
```