Please choose the correct ending to complete the given sentence: Brushing teeth: A little boy walk toward the sink. the boy

Ending1: falling shits his pants from the bottom out. Ending2: stands water to rinse his mouth. Ending3: stands on front the sink and puts toothpaste on the brush, and then brush the teeth. Ending4: rinses his cup in the pot, then put glasses on it.

Answer format: ending1/ending2/ending3/ending4