Subtask 
-------- 
Dilation SE5
Dilation SE2
 Erosion SE5
 Erosion SE2
Dilation SE8
Dilation SE4
 Erosion SE8
 Erosion SE4

Subtask 
-------- 
Dilation SE5
Dilation SE3
 Erosion SE5
 Erosion SE3
Dilation SE8
Dilation SE4
 Erosion SE8
 Erosion SE4

Subtask 
-------- 
Dilation SE2
Dilation SE7
 Erosion SE2
 Erosion SE7
Dilation SE8
Dilation SE4
 Erosion SE8
 Erosion SE4