> stem(x, par1, par2, par3)
  The decimal point is 1 digit(s) to the right of the |
   5 | 89
   6 | 0346689
   7 | 001122333444466789999
   8 | 00111111122223333466668999
   9 | 02222344456778
  10 | 001113455566777788
  11 | 0011789
  12 | 37
  13 | 8