Its possible that 1y1 denoted planet, wyw is without
atmosphere, and zyz is with atmosphere.  The 
medium (earth sized?) and large (gas giant?) planets
would have atmosphere, a little planet wouldn't.  
We will have to wait for more information to resolve
this controversy.  I do like W as a naming convention
for the planets.  In reply to some of the recent postings,
I think the pP...Pp as picture interpretation is 
obsolete.  The following pictures could just be meant to
explain the p is radius or circle.  Of course no one knows
what the lone p means.  Look at Andrew Plotkin's WWW
page to see how the multiple G's make paragraphs.

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