Please choose the correct ending to complete the given sentence: Fun sliding down: A man is on a playground with his dogs. The three dogs run with him in circles around the equipment, and up the stairs. they

Ending1: stretch, then walk through the door. Ending2: help each other pick up the slack line. Ending3: slide down the slides behind him happily. Ending4: stop and see what's going on.

Answer format: ending1/ending2/ending3/ending4