Subtask 
-------- 
Dilation SE5
Dilation SE7
 Erosion SE5
 Erosion SE7
Iterate 4 Dilation SE6
Iterate 4  Erosion SE6

Subtask 
-------- 
Dilation SE4
Dilation SE6
 Erosion SE4
 Erosion SE6
Iterate 4 Dilation SE6
Iterate 4  Erosion SE6

Subtask 
-------- 
Dilation SE2
Dilation SE5
 Erosion SE2
 Erosion SE5
Iterate 4 Dilation SE6
Iterate 4  Erosion SE6