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 teacher took roll, so she could get a better understanding of what was going on in the classroom
Example Output: plausible

Example Input: The product was heavily advertised, so of course I had to check it out
Example Output: plausible

Example Input: The tenant misplaced his keys to his apartment, so causing him to be locked out of the apartment
Example Output:
plausible