A timing system for {HEAD ~ swimming race} which records, displays, and prints {TAIL ~ the time} of race 
prints
A timing system for { HEAD ~ swimming race } which records , displays , and prints { TAIL ~ the time } of race
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH