-- SAMPLE 1 --
5 3 0 8 2 3 0 3 2 0 8
-- SAMPLE 2 --
8 0 0 4 5 0 3 9
    2 3 1 2 1 0
      7 0 8 1 3
        2 0 5 2
	  1 2 3
	    1 0
	      0
