Tetris
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#4a2 4a2 4f2 4d2 4f2 4a2 #4a2
#4a2 4a2 4f2 4d2 4f2 4a2 #4a2

#4a2 4a2 4f2 4c2 4f2 4a2 #4a2
#4a2 4a2 4f2 4c2 4f2 4a2 #4a2   and repeat