Please choose the correct ending to complete the given sentence: Doing karate: Then one of the masters holds a wooden board suspended on a string while the other master concentrates and punches into the board to split it into two. the same move

Ending1: is shown with one master swinging an ax on to the other to split the board. Ending2: continues on with one single master punching into the board repeatedly and doing a multitude of fade in and then responds with a certain hit. Ending3: is shown again in slow motion while the main master tunnels through the splits while the second master is seen cutting through the split. Ending4: is repeated several times in slow motion.

Answer format: ending1/ending2/ending3/ending4