> 0.8 contour -Z0.8
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> 1.6 contour -Z1.6
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> 2.4 contour -Z2.4
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> 3.2 contour -Z3.2
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> 4 contour -Z4
-152.8927	53.7230213147	4
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> 4.8 contour -Z4.8
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> 5.6 contour -Z5.6
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