A medical technique comprises the steps of attaching a hammock to {TAIL ~ the head rail} and foot rail of {HEAD ~ a crib}, and placing a child in the hammock 
A medical technique comprises the steps of attaching a hammock to { TAIL ~ the head rail } and foot rail of { HEAD ~ a crib } , and placing a child in the hammock
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH