The image shows a black and white drawing of a sphere with a circle in the middle of it, surrounded by lines and letters.
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The image shows a black and white drawing of a sphere with a circle in the middle of it, surrounded by lines and letters. The background is white, and the sphere is labeled with the letters "A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T".