Really great, but piano and Wurlitzer could be swapped over between their respective groups, so there are two valid solutions. Some pianos fit the link for the Wurlitzer group while not all Wurlitzers do (I'd only ever heard of them as pipe organs, but the brand produced a wide range of other acoustic instruments), while both Wurlitzers and pianos fit the group piano is in.

@Malcontent, you're right. I've edited it and switched Piano to Fortepiano and Wurlitzer to Keytar (because it's fun !)