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 was lost, so he refused to do so
Example Output: not plausible

Example Input: The clock stopped ticking, so I could get a good night's sleep
Example Output: plausible

Example Input: I clumsily bumped into the stranger, so I could get a better look
Example Output:
plausible