1000 
1000
400
100
+4
1000
1000
400
100
+8
1
1
1000
1000
400
100
+8
1000
1000
400
100
+7
1000
1000
400
100
+8
1000
1000
400
100
+10
1000
1000
400
100
+8
1000
1000
400
100
+7