My design for a fancy Christmas tree is below, but it looks too plain for a greeting card without some bright holiday colors. The holiday stumper is to color in the tree using only four colors, with the special restriction that any adjacent regions with a common boundary must have different colors. The tree itself is part of the puzzle! A handy way to play with this stumper is to download the image and use a graphics program with a Fill tool to color in the regions. It also works to pencil in different letters. You will need to erase. Have a puzzling holiday!
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