____________________
|  1001   |   1002   |        <---  This is @ar_1
|_________|__________|



______________________________________________________
| 1001   | a |  1003  |  b |  1001  | s |  1002 |  d | 
-------------------------------------------------------
___________________________________
 1003 | m |  1002 | r |  1001 | a |  <--This is @ar_2
-----------------------------------