(...)
+C<span id="C">
      C A
      C B
      C C
      C D
      C E</span>
+D<span id="D">
    +D A<span id="DA">
        D A A
        D A B
        D A C
        D A D</span>
      D B
      D C
   +D D<span id="DD">
        D D A
        D D B
        D D C
        D D D</span></span>
+E<span id="E">
      E A
      E B</span>
+F<span id="F">
(...)