1000 
1000
400
100
+16
1000
1000
400
100
+8
1000
1000
400
100
+7
1000
1000
400
100
+3
1000
1000
400
100
+6
2
1
1000
1000
400
100
+8
1000
1000
400
100
+8
1000
1000
400
100
+6