1 2 7	 1 2 6	 2 2 7	 3 2 7	 2 0 7	 3 0 7	 0 1 7	 7 1 10	 6 0 7	 10 11 7	 2 11 7	 0 11 6	 13 0 7	 13 12 10	 14 1 7			 16