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A tiling consisting of a rhombus such that 17 rhombuses fit around a point and a second tile in the shape of six rhombuses
stuck together. These two tiles can fill the plane in exactly four different ways.
Two tiles which tile the plane in 
ways can be constructed using a rhombus of a shape such that
pack around a point together with
a complex piece made by sticking 
rhombuses together (Wells 1991).
