Subtask 
-------- 
Dilation SE6
Dilation SE2
 Erosion SE6
 Erosion SE2
Iterate 4 Dilation SE2
Iterate 4  Erosion SE2

Subtask 
-------- 
Dilation SE4
Dilation SE2
 Erosion SE4
 Erosion SE2
Iterate 4 Dilation SE2
Iterate 4  Erosion SE2

Subtask 
-------- 
Dilation SE8
Dilation SE4
 Erosion SE8
 Erosion SE4
Iterate 4 Dilation SE2
Iterate 4  Erosion SE2