Design and Copyright : Tamás Vanyó (2014).
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DDDD.|...DD|DDDD. D..D.|.....|D..D. D..D.|.....|D..D. DDDD.|.....|DDDD.
EEEE.|.....|EEEE. E..E.|...EE|E..E. E..E.|.....|E..E. EEEE.|.....|EEEE.