1-2-1-3M
Rotate the upper right cell of the tile 90 degrees clockwise; mirror, then rotate the lower right cell of the tile 180 degrees. Shape 6 Shape 7 Shape 23 Shape 137
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1-3M-1-3M
Mirror, then rotate alternate columns 180 degrees. I call this one “Birds of a Feather” because when you turn it upside down, the left-facing nesting birds become right-facing nesting birds. Shape 23 Shape 24
