Subtask 
-------- 
Dilation SE7
Dilation SE1
 Erosion SE7
 Erosion SE1
Dilation SE2
Dilation SE8
 Erosion SE2
 Erosion SE8

Subtask 
-------- 
Dilation SE1
Dilation SE5
 Erosion SE1
 Erosion SE5
Dilation SE2
Dilation SE8
 Erosion SE2
 Erosion SE8

Subtask 
-------- 
Dilation SE1
Dilation SE5
 Erosion SE1
 Erosion SE5
Dilation SE2
Dilation SE8
 Erosion SE2
 Erosion SE8