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The consists of three circles which are divided into eight equal segments.
Figure a: Here the segments labeled from upper right end in clockwise direction are given as follows. 0, 1, 2, 3, 4, 5, 6, 7.
Figure b: Here the segments labeled from upper right end in clockwise direction are given as follows. 0, 4, 1, 5, 2, 6, 3, 7.
Figure c: Here the segments labeled from upper right end in clockwise direction are as follows. 0, 3, 6, 1, 4, 7, 2, 5.
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