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> 3 contour -Z3
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> 4.5 contour -Z4.5
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> 6 contour -Z6
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> 7.5 contour -Z7.5
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> 9 contour -Z9
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> 10.5 contour -Z10.5
-73.4544333333	-17.7809761063	10.5
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> 12 contour -Z12
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