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Each color is touched by at most one color on top and one color on bottom. Looking at the original 7-Venn we get Red->Orange->Yellow->Green->Blue->Purple. Chang
by jgeralnik 14y ago
Each color is touched by at most one color on top and one color on bottom. Looking at the original 7-Venn we get Red->Orange->Yellow->Green->Blue->Purple. Change the odd colors to white and the even colors to black and you're done.