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

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

Subtask 
-------- 
Dilation SE7
Dilation SE1
 Erosion SE7
 Erosion SE1
Dilation SE6
Dilation SE7
 Erosion SE6
 Erosion SE7