________________________________________________________________
________________________________________________________________
________________________________________________________________
2_2_2_2__2_2_2_2_________________2_2_2_2__2_2_2_2_
_______________3_3_3_3_5_5_5_5___________________3_3_3_3_5_5_5_5
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
_________________________________________________________5_5_4_4_0_0
7_7_7_7__7_7___7_7_7_7__7_7___3_3_3_3__3_3__5_5_5_5__5_5____________
0_0_0_0__0_0___0_0_0_0__0_0___0_0_0_0__0_0__0_0_0_0__0_0____________