Data from atcroft
--------------------
a
  b
  e
    f
      g
  c
    d
h
  i
    j
--------------------
a
  b
  c
    d
  e
    f
      g
h
  i
    j
====================
Data from tybalt
--------------------
j
  i
  h
    g
      f
  e
    d
c
  b
    a
--------------------
    a
  b
c
    d
  e
      f
    g
  h
  i
j
====================