Step ladder, What are you doing?
2 l
1
1000 
1000
400
100
+117
1000
1000
400
100
+79
13
6
6
1000
1000
400
100
+111
1000
1000
400
100
+61
1000
1000
400
100
+69
1000
1000
400
100
+289
1000
1000
400
100
+155