Subtask 
-------- 
Dilation SE6
Dilation SE2
 Erosion SE6
 Erosion SE2
Dilation SE2
Dilation SE7
 Erosion SE2
 Erosion SE7

Subtask 
-------- 
Dilation SE8
Dilation SE8
 Erosion SE8
 Erosion SE8
Dilation SE2
Dilation SE7
 Erosion SE2
 Erosion SE7

Subtask 
-------- 
Dilation SE4
Dilation SE2
 Erosion SE4
 Erosion SE2
Dilation SE2
Dilation SE7
 Erosion SE2
 Erosion SE7