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Figure 2: Ranking the asymmetry of the TMA design The figure depicts pair wise comparisons (top, bottom) of TMA design with sectors (left) and solid (right). In all of them, empty spots are marked as "0", filled ones as "1". The number of filled and empty spots is noted above each design. Left of each design are listed the seven transformations (ϕ ) and the calculated rank of that transformation (see text). A rank of "0" in any permutation will result in discarding the design, because of symmetry 
