Subtask 
-------- 
Dilation SE8
Dilation SE4
 Erosion SE8
 Erosion SE4
Iterate 3 Dilation SE7
Iterate 3  Erosion SE7

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

Subtask 
-------- 
Dilation SE2
Dilation SE8
 Erosion SE2
 Erosion SE8
Iterate 3 Dilation SE7
Iterate 3  Erosion SE7