Write a method called clump that accepts an ArrayList of strings as a parameter and replaces each pair of strings with a single string that consists of the two original strings in parentheses separated by a space. If the list is of odd length, the final element is unchanged. For example, suppose that a list contains ["four", "score", "and", "seven", "years", "ago", "our"]. Your method should change the list to store ["(four score)", ("and seven"), ("years ago"), "our"].
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