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http://jgjhgjf.hatenablog.com/entry/2018/02/10/065958#%E7%BE%BD%E6%A0%B9%E7%AB%A0%E6%82%A6

Based on this post, I presume that Okada did all the A part of this episode, and Furusawa the B part (they were the only two animators on the episode)