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's eye became infected, so I decided to follow him
Example Output: not plausible

Example Input: The physician misdiagnosed the patient, so I didn't worry about it
Example Output: not plausible

Example Input: Several witnesses of the crime testified against the suspect, so there was no one to investigate the case
Example Output:
not plausible