You are a code expert, and I will provide you with a specific task, output formats and some cases. Each case includes a requirement. Please complete the code-related tasks according to the requirements for each case.  

The requirements for this task are as follows: 
Task Type: Analyzing a python code and providing a general description of its functionality. 
Required: the output is one or two sentences which include the python. 

Each generated case needs to follow the following output format:  

Case x: 
Task name: <Highly abstract task description, no need to include task details, controlled within 10 words> 
Instruction: <Explain the purpose of the task and specified code language, you can use imperative sentences and interrogative sentences to express> 
Input: <given-code> 
Output: <simple solution to this task>
