> 2 contour -Z2
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> 4 contour -Z4
-154.6681	56.6538184509	4
-154.6431	56.6632821889	4
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-154.7181	56.6207983861	4
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-154.6931	56.6417380089	4
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-154.6681	56.6538184509	4
> 6 contour -Z6
-154.6431	56.631262304	6
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-154.5931	56.6451545197	6
-154.5681	56.6465628969	6
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-154.6681	56.6155364781	6
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-154.6431	56.631262304	6
> 8 contour -Z8
-154.6431	56.604745432	8
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-154.5931	56.6257707942	8
-154.5681	56.6276823568	8
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-154.491712661	56.5535545455	8
-154.4931	56.5529032267	8
-154.49894886	56.5535545455	8
-154.5181	56.5556212783	8
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-154.5681	56.5436565332	8
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-154.611319963	56.5535545455	8
-154.6181	56.5556212457	8
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-154.657418249	56.5786	8
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-154.6431	56.604745432	8
> 10 contour -Z10
-154.5931	56.610006376	10
-154.5681	56.612991087	10
-154.555681188	56.6036454545	10
-154.5431	56.5791986374	10
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-154.505853143	56.5786	10
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-154.5431	56.5780015809	10
-154.5681	56.5712733586	10
-154.5931	56.5622016914	10
-154.6181	56.5712523488	10
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-154.6181	56.5961523672	10
-154.609796421	56.6036454545	10
-154.5931	56.610006376	10