Please choose the correct ending to complete the given sentence: Swimming: A "total immersion swimming" logo and "total immersion freestyle demo by shinji takeuchi" appear on screen. Takeuchi swims the length of an indoor pool. the video

Ending1: ends with the subscribe's logo visible in a dark room. Ending2: then cuts to a man surfing under the water repeatedly. Ending3: ends with several captions visible in between. Ending4: changes to an underwater view of the takeuchi swimming.

Answer format: ending1/ending2/ending3/ending4