> 3 contour -Z3
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> 6 contour -Z6
-167.1976	52.9121244562	6
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> 9 contour -Z9
-167.1726	52.8854407468	9
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> 12 contour -Z12
-167.1726	52.8657285952	12
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> 15 contour -Z15
-167.1976	52.8372178805	15
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> 18 contour -Z18
-167.1726	52.8357748044	18
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-167.177663851	52.7584054795	18
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> 21 contour -Z21
-167.1226	52.8357757803	21
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