> stem(x, par1, par2, par3)
  The decimal point is at the |
   7 | 0
   8 | 0
   9 | 000000
  10 | 0000
  11 | 000000000000
  12 | 0000000000000000
  13 | 0000000000000000000
  14 | 0000000000000000000000000
  15 | 00000000000000000000000000000000000
  16 | 00000000000000000000000
  17 | 000000000000
  18 | 00000
  19 | 000