Please choose the correct ending to complete the given sentence: Doing karate: There are three black belt karate masters demonstrating and doing karate in a large gym with several spectators. the three masters

Ending1: are matching each others step for step that allows them to work out while standing and moving their bodies. Ending2: show synchronized karate chops and moves as they show striking moves with open and techniques while kicking with their right leg. Ending3: are positioned on a colorful blue mat and began slicing belts in the air to either side of them between front legs and they began to demonstrate several moves. Ending4: form a v section and start each separate style of karate.

Answer format: ending1/ending2/ending3/ending4