URL trie

- B/N/L shows Branch/Nub/Leaf
- the number is the number of cells represented by the current node

B    0  com.
B    0      edsBlog/directory
B    0                       Aa/page
  L  5                              Aaa
  L  5                              Bbb
  L  5                              Ccc
  L  5                              Ddd
B    0                       Bb/page
  L  5                              Eee
  L  5                              Fff
  L  5                              Ggg
  L  5                              Hhh
B    0      isabellasBlog/directory
B    0                             Aa/page
  L  5                                    Aaa
  L  5                                    Bbb
  L  5                                    Ccc
  L  5                                    Ddd
B    0                             Bb/page
  L  5                                    Eee
  L  5                                    Fff
  L  5                                    Ggg
  L  5                                    Hhh