Subtask 
-------- 
Dilation SE7
Dilation SE5
 Erosion SE7
 Erosion SE5
Iterate 3 Dilation SE3
Iterate 3  Erosion SE3

Subtask 
-------- 
Dilation SE3
Dilation SE8
 Erosion SE3
 Erosion SE8
Iterate 3 Dilation SE3
Iterate 3  Erosion SE3

Subtask 
-------- 
Dilation SE2
Dilation SE4
 Erosion SE2
 Erosion SE4
Iterate 3 Dilation SE3
Iterate 3  Erosion SE3