Task: Text Completion
Input (English): [header] How to do a seated figure four [title] Sit properly. [step] To do any seated yoga variation, you must be sitting in a solid, stable chair that allows you to place both of your feet firmly on the floor. Chairs with wheels or with a lot of cushioning in the seat typically aren't the best choices. <sep> (A) [substeps] Sit forward on the edge of your chair and make sure your back is neutral, not arched. You should be sitting on your " sit bones "-two points you'll be able to feel on your buttocks-not on your tailbone. (B) [substeps] Sit with both feet flat on the floor. If your chair's wheels don't provide enough cushioning, your feet are likely to feel awkward. (C) [substeps] The squat position is generally preferred for beginners. To get a deeper understanding of the pose, instead of trying to open your thighs with your toes, tilt your hips forward, keeping your toes off the floor and just gliding your palms over the chair legs. (D) [substeps] If you do sit on the floor, make sure to lay your back flat on the floor. Otherwise, the weight of your hips will strain or buckle the chair.
Output (English): A