> stem(x, par1, par2, par3)
  The decimal point is 2 digit(s) to the right of the |
  0 | 01344
  0 | 66667799
  1 | 0134444
  1 | 5667778888999999
  2 | 000000011111111222222223333444444444
  2 | 555556666666677788999
  3 | 01111223
  3 | 5567888999
  4 | 00001234444
  4 | 58
  5 | 1
  5 | 6
  6 | 01
  6 | 5569
  7 | 0
  7 | 6