12
0         	14 14 14
1        	12 12 12 
3        	15 15 15
4        	12 12 12
5        	 8  8  8
6        	13 13 13
7        	10 10 10
10        	 0  0  0
12        	 8  8  8
13        	 4  4  4
14        	10 10 10
15        	 0  0  0