The first pattern and the second pattern are the same when the layer of gating agent is intermediate the substrate and the layer of {TAIL ~ principal substance}, and the first pattern and the second pattern are different when {HEAD ~ the layer} of principal substance is intermediate the substrate and the layer of gating agent 
The first pattern and the second pattern are the same when the layer of gating agent is intermediate the substrate and the layer of { TAIL ~ principal substance } , and the first pattern and the second pattern are different when { HEAD ~ the layer } of principal substance is intermediate the substrate and the layer of gating agent
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH