Please choose the correct ending to complete the given sentence: Health: [header] How to stretch your hands [title] Bend back individual fingers. [step] Starting with your right hand, extend your arm out in front of you with your palm facing forward and your fingers pointing straight up. With your left hand, reach out and gently pull back on each finger, starting with your index finger, followed by the middle, ring, and pinky fingers.

Ending1: [substeps] This stretch stretches the crossed joints of your right and left hands, as well as the joint responsible for keeping the heel of your right hand flat on the floor. Hold this stretch for at least 20 minutes. Ending2: [substeps] Hold the stretch in each finger for a few breaths. Repeat the stretch with the fingers on your left hand. Ending3: [substeps] Do this a few times to stretch each finger. [title] Reach back with your right hand and pull straight up. Ending4: [substeps] The technique is the same here, but you may first pull on your right fingers. If you used your left hand only once or twice, it may take several seconds to do the stretch.

Answer format: ending1/ending2/ending3/ending4