Convert in less than 30 lines

gistfile1.txt

Question: Convert following into the latter data structure in less than 30 lines:

List:
  A, B, C
  A, C, E
  E, F, D
  D, A, J
  E, D, J

List
  A, B, 1 (frequency)
  A, C, 2
  A, D, 1
  A, E, 1
  A, J, 1
  B, C, 1
  C, E, 1
  D, E, 2
  D, F, 1
  D, J, 2
  E, F, 1
  E, J, 1

solution.rb

list = [["A", "B", "C"], ["A", "C", "E"], ["E", "F", "D"], ["D", "A", "J"], ["E", "D", "J"]].map { |item| item.permutation(2).to_a.map(&:sort).uniq }.flatten(1)
combo = list.uniq.map {|c| c + [list.count(c)] }
combo

Yeah I realized that after I posted it. Figured it didn't matter though since, like you, anyone who knows ruby knows that the assignment in line 2 and all of line 3 do nothing. They were left over from my testing where I was inspecting 'combo'