{HEAD ~ The lock arrangement} is hidden in {TAIL ~ one form}, so that it may not be tampered with from the exterior 
{ HEAD ~ The lock arrangement } is hidden in { TAIL ~ one form } , so that it may not be tampered with from the exterior
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH