> stem(x, par1, par2, par3)
  The decimal point is at the |
   8 | 458
   9 | 157
  10 | 01239
  11 | 045678
  12 | 07
  13 | 34557
  14 | 356779
  15 | 04579
  16 | 224577
  17 | 3456666778
  18 | 2455669
  19 | 034455666779999
  20 | 001245667
  21 | 001334556679
  22 | 25669
  23 | 25577
  24 | 12778
  25 | 68
  26 | 9
  27 | 4666
  28 | 6
  29 | 45
  30 | 3