/-MSaaaaaa
                  /MSaaaaa
                 |       \MSaaaaap-MSaaaaapa
                 |
                 |       /-MSaaaapa
                 |-MSaaaap
                 |       \-MSaaaapp
            /MSxaaa
           |     |       /-MSpaaaaa
           |     |-MSpaaaa
           |     |       \-MSpaaaap
           |     |
           |     |       /-MSpaaapa
       /MSxaa     \MSpaaap
      |    |             \-MSpaaapp
      |    |
      |    |             /-MSaaapaa
      |    |            |
      |    |      /MSxaapaMSxaapap-MSaaapapp
      |    |     |      |
      |     \MSxaap      \-MSpaapaa
      |          |
   /MSxa          \MSaaapp-MSaaappp
  |   |
  |   |                  /-MSxapaaa
  |   |           /MSxapaa
  |   |          |       \MSxapaap-MSxapaapa
  |   |     /MSxapa
  |   |    |     |       /MSxapapa-MSxapapaa
  |   |    |      \MSxapap
  |   |    |             \-MSxapapp
  |    \MSxap
  |        |      /-MSaappa
  |        |     |
  |        |     |       /MSxapppa-MSxapppax
-MSx        \MSxappMSxappp
  |              |       \MSxapppp-MSxappppx
  |              |
  |               \MSpappa-MSpappax
  |
  |               /MSxpaaa-MSxpaaaa
  |         /MSxpaa
  |        |      \MSxpaap-MSxpaapp
  |    /MSxpa
  |   |    |      /MSxpapa-MSxpapaa
  |   |     \MSxpap
  |   |           \MSxpapp-MSxpappp
  |   |
   \MSxp                 /-MSxppaaa
      |           /MSxppaa
      |     /MSxppa      \-MSxppaap
      |    |     |
      |    |      \-MSxppap
       \MSxpp
           |             /-MSxpppaa
           |      /MSxpppa
            \MSxppp      \-MSxpppap
                 |
                  \MSxpppp-MSxppppx