Intersection Command

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Intersection( <List>, <List> )
Gives you a new list containing all elements that are part of both lists.
Example:
Let list1 = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} and list2 = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30} be two lists. Intersection(list1, list2) yields a new list list3 = {2, 4, 6, 8, 10, 12, 14}.
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