> stem(x, par1, par2, par3)
  The decimal point is 1 digit(s) to the right of the |
   0 | 00112344555666789
   1 | 0111223344444456668899
   2 | 011111111333444455555666666777888999
   3 | 00011222233334444455666777888889999999
   4 | 0011112233355667777889999
   5 | 01112455566677889
   6 | 00011344445577889
   7 | 0022335667888999
   8 | 02233444778999
   9 | 001123456789
  10 | 011111357889
  11 | 022334677888999
  12 | 03334577799
  13 | 11122333669
  14 | 112444579
  15 | 012
  16 | 23668
  17 | 779
  18 | 7
  19 | 36
  20 | 
  21 | 1
  22 | 
  23 | 0
  24 | 5