2	3	
8	11
-17	-15	-15	
-13	-15	-16	
-19	-10	-15	
-10	-13	-17	
-11	-20	-18	
-16	-12	-18	
-17	-10	-13	
-19	-18	-10	
11	11	17	
15	19	11	
19	14	20	
11	15	15	
15	17	19	
15	11	17	
12	13	18	
19	12	18	
15	16	13	
13	14	16	
20	10	13