content: import Data.List
  import Control.Arrow
  import Control.Monad
  
  nlsRaw = "12 127 28 42 39 113 42 18 44 118 44 37 113 124 37 48 127 36 29 31"
    ++ " 125 139 131 115 105 132 104 123 35 113 122 42 117 119 58 109 23 105 63"
    ++ " 27 44 105 99 41 128 121 116 125 32 61 37 127 29 113 121 58 114 126 53"
    ++ " 114 96 25 109 7 31 141 46 13 27 43 117 116 27 7 68 40 31 115 124 42 128"
    ++ " 52 71 118 117 38 27 106 33 117 116 111 40 119 47 105 57 122 109 124 115"
    ++ " 43 120 43 27 27 18 28 48 125 107 114 34 133 45 120 30 127 31 116 146"
  
  nls :: [Int]
  nls = map read $ words nlsRaw
  
  groupWith f = takeWhile(not.null). unfoldr(Just. (partition =<< (. f). (==). f. head))
  justifyR = foldl ((. return) . (++) . tail) . flip replicate ' '
  
  task ds = mapM_ (putStrLn. showStemLeaves justifyR fb. (head *** sort.concat). unzip)
      $ groupWith fst $ stems ++ map (second return) stemLeaf
    where stemLeaf = map (`quotRem` 10) ds
  	stems = map (flip(,)[]) $ uncurry enumFromTo $ minimum &&& maximum $ fst $ unzip stemLeaf
  	showStemLeaves f w (a,b) = f w (show a) ++ " |" ++ concatMap (f w. show) b
  	fb = length $ show $ maximum $ map abs ds
  