>>> permutationsort ([16, 23, 4, 8, 15, 42] :: [Int]) [4,8,15,16,23,42]
>>> permutationsort ([(1, 16), (5, 23), (2, 4) ,(3, 8), (0, 15) , (4, 42)] :: [(Int, Int)]) [(0,15),(1,16),(2,4),(3,8),(4,42),(5,23)]