In this task, you will be given two sentences separated by ", so". You should decide whether the first sentence can be the cause of the second sentence. If you can see a possible causation, answer with "plausible", otherwise answer with "not plausible".

Example Input: My foot went numb, so I had to come back to the doctor
Example Output: plausible

Example Input: The pond froze over for the winter, so we didn't have too much snow
Example Output: not plausible

Example Input: The woman's date wanted to look like a gentleman, so she didn't want to wear anything too fancy
Example Output:
not plausible