> 2 contour -Z2
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> 4 contour -Z4
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> 6 contour -Z6
-176.1244	51.4274637338	6
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> 8 contour -Z8
-176.1744	51.3045773543	8
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> 10 contour -Z10
-176.0244	51.2255735151	10
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> 12 contour -Z12
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