--- >
  0
--- >+
  1
--- >-
  2
--- >
  3
  3
--- >+
  4
  4
--- >-
  5
  5
--- >
  6

  6
--- >+
  7

  7
--- >-
  8

  8
--- >
  9
   
  9
--- >+
  a
   
  a
--- >-
  b
   
  b
--- >
  c
   c
  c
--- >+
  d
   d
  d
--- >-
  e
   e
  e
--- >
  f
   

  f
--- >+
  g
   

  g
--- >-
  h
   

  h