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: The man looked at his watch, so he knew it wasn't him
Example Output: not plausible

Example Input: The woman shivered as she got out the pool, so she decided to take a shower
Example Output: not plausible

Example Input: It got dark outside, so the moon became visible in the sky
Example Output:
plausible