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Write a Python function `reverse_words(s: str) -> str` that takes a string `s` as input and returns a new string where the order of the words is reversed. Words in the input string are separated by single spaces, and there are no leading or trailing spaces.
#### Example Usage
```python [main.nopy]
reverse_words("hello world") # Output: "world hello"
reverse_words("python programming") # Output: "programming python"
reverse_words("a b c") # Output: "c b a"
```
#### Constraints
- The input string will only contain printable ASCII characters.
- Words are separated by single spaces, and there are no extra spaces in the input string.def reverse_words(s: str) -> str:
"""
Reverse the order of words in the input string.
Args:
s (str): The input string containing words separated by spaces.
Returns:
str: A new string with the words in reversed order.
"""
# Split the string into words, reverse the list of words, and join them back.
pass # Replace this with your implementation