ashley11 0 Light Poster

(1): 4
(2): 4
(1 2): 3
(3): 4
(1 3): 3
(2 3): 3
(1 2 3): 2
Above are show my sortedList.
may i know how to extract the double itemset and store in another new sortedList?
my expected output in my new sortedList are:
(1 2): 3
(1 3): 3
(2 3): 3
(1 2 3): 2

hope anyone can help me..

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