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