1: 
------------14--15----
--12--13--------------
-------------------------
-------------------------
-------------------------
-------------------------

2:
-------13--------15---
---12------14---------
-------------------------
-------------------------
-------------------------
-------------------------

3:
-------13--14---------
---12----------15-----
-------------------------
-------------------------
-------------------------
-------------------------

4:
------------14--15----
--12---13-------------
-------------------------
-------------------------
-------------------------
-------------------------

5:
--12-------------15---
--------13--14--------
-------------------------
-------------------------
-------------------------
-------------------------

6:
--12---------14-------
--------13-------15---
-------------------------
-------------------------
-------------------------
-------------------------

7:
-------13------15-----
--14-------12---------
-------------------------
-------------------------
-------------------------
-------------------------

8:
--12-----------15-----
-------13--14---------
-------------------------
-------------------------
-------------------------
-------------------------

9:
--12--13--------------
-------------14---15--
-------------------------
-------------------------
-------------------------
-------------------------

10:
--------13--14--------
--15-------------12---
-------------------------
-------------------------
-------------------------
-------------------------

11:
--12--------14--------
-------15---------13--
-------------------------
-------------------------
-------------------------
-------------------------

12:
--12---13-------------
-------------14---15--
-------------------------
-------------------------
-------------------------
-------------------------