ok it goes like this....this is wat i think
15-15-15-15-15-15-15-15-x-x-x-x-x-x-x-x-x-x-x-x
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
[ Tab from: https://www.guitartabs.cc/tabs/s/system_of_a_down/the_metro_tab.html ]
15-15-15-15-15-15-15-15----15-15-15-15-15-15-15-15
--------------------------------------------------
--------------------------------------------------
--------------------------------------------------
--------------------------------------------------
--------------------------------------------------
15-14-14-13-13-12-12-11-11-10-10-9---15-14-14-14-14-13-13-12-12-11-11-10-10-9
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
and thats the begging