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: I stood on one foot, so I could see her face
Example Output: not plausible

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

Example Input: I rubbed sandpaper on the wood, so in order to give it a smoother surface
Example Output:
plausible