Please choose the correct ending to complete the given sentence: Playing rubik cube: A group of four boys are at a table. as a timer

Ending1: counts down, they add ice cubes to the machine to make a drink. Ending2: counts down, the three boys wearing white shake hands. Ending3: begins, they begin to play a game of beer pong. Ending4: counts, a boy is trying to solve a rubik's cube.

Answer format: ending1/ending2/ending3/ending4