Three female swimmers in swim caps and goggles are lined up in a pool with their arms outstretched .
Three men swim laps in order to train for their next competition .
Three female swimmers in swim caps and goggles are lined up in a pool with their arms outstretched.
Three men swim laps in order to train for their next competition.
Three people are either female or male but can't be both.
Three people are either female or male but ca n't be both .