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plot [16.5,18.3, 21.8, 25.6, 29.2, 31.9, 32.6, 32.4, 30.3, 26.4, 21.3, 18.0]
plot [16.5,18.3, 21.8, 25.6, 29.2, 31.9, 32.6, 32.4, 30.3, 26.4, 21.3, 18.0]
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