Subtask 
-------- 
Dilation SE5
Dilation SE1
 Erosion SE5
 Erosion SE1
Dilation SE7
Dilation SE2
 Erosion SE7
 Erosion SE2

Subtask 
-------- 
Dilation SE2
Dilation SE5
 Erosion SE2
 Erosion SE5
Dilation SE7
Dilation SE2
 Erosion SE7
 Erosion SE2

Subtask 
-------- 
Dilation SE4
Dilation SE5
 Erosion SE4
 Erosion SE5
Dilation SE7
Dilation SE2
 Erosion SE7
 Erosion SE2