The blister sheet is in {TAIL ~ the form} of a strip with {HEAD ~ the blisters} aligned 
The blister sheet is in { TAIL ~ the form } of a strip with { HEAD ~ the blisters } aligned
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH