--------------gennin
---------------gennin
------------------chunnin
------->genin
-----------------chunin
-----------------chunin
-------------------------chunin
------->Chunin
-----------jounin
----------------------jounin
----------------------jounin
------>Jounin
------->jounin
------------------------anbu
-----------------------anbu
----------------anbu
-------------------sannin
-----------------sannin
----------------sannin