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 physician misdiagnosed the patient, so we had to wait a bit
Example Output: not plausible

Example Input: The doctor x-rayed the patient's arm, so he went to the vet
Example Output: not plausible

Example Input: It got dark outside, so we called it a night
Example Output:
plausible