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 toddler became cranky, so her mother put her down for a nap
Example Output: plausible

Example Input: The toddler became cranky, so I took him to the vet
Example Output: not plausible

Example Input: The man signed the document, so it shouldn't be too much of a problem for him
Example Output:
plausible