Subtask 
-------- 
Dilation SE7
Dilation SE5
 Erosion SE7
 Erosion SE5
Dilation SE6
Dilation SE6
 Erosion SE6
 Erosion SE6

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

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