Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do center splits [title] Do a butterfly stretch. [step] The butterfly stretch is a great stretch for the center splits as it increases flexibility in the inner thighs, the groin and the hips. To perform : [substeps] Sit on the floor and bend your knees until the soles of your feet are touching.

Ending1: Pull your heels as close towards your body as possible and use your elbows to push your knees towards the floor. Make sure to sit upright with your back straight. Ending2: The palms of your hands should be facing the floor behind you. Your lower back should be flat on the floor. Ending3: Slide your right foot slightly forward towards your side. Return your right heel to the floor and roll over on your right side. Ending4: Rest your palms on your thighs just below your hips. The overlap of your palms on the floor will keep your legs locked.

Answer format: ending1/ending2/ending3/ending4