Subtask 
-------- 
Dilation SE6
Dilation SE6
 Erosion SE6
 Erosion SE6
Dilation SE4
Dilation SE2
 Erosion SE4
 Erosion SE2

Subtask 
-------- 
Dilation SE2
Dilation SE2
 Erosion SE2
 Erosion SE2
Dilation SE4
Dilation SE2
 Erosion SE4
 Erosion SE2

Subtask 
-------- 
Dilation SE3
Dilation SE8
 Erosion SE3
 Erosion SE8
Dilation SE4
Dilation SE2
 Erosion SE4
 Erosion SE2