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 surfer caught the wave, so we knew we were on the right track
Example Output: not plausible

Example Input: The police aimed their weapons at the fugitive, so they were able to kill
Example Output: not plausible

Example Input: I held the door for the woman entering behind me, so she could close the door
Example Output:
plausible