Task: Text Completion
Input (English): [header] How to throw a curveball [title] Grip the ball between your thumb and middle finger. [step] Place your middle finger along the bottom seam of the baseball and your thumb along the back seam. Leave your index finger off the ball. <sep> (A) Instead of using it to grip the ball, you'll be using it to point at where you want the ball to go. [substeps] Hold the baseball such that the curves of the seams are close to your palm, with one on top and one on the bottom of your palm. (B) [substeps] Try this trick by throwing a ball in two reverse positions. Place your thumb on the bottom seam, where it provides resistance while building up strength, then throw the ball upward. (C) [substeps] Also, keeping your index finger and thumb off the ball will reduce the chance of the ball being unbalanced and/or broken during the swing. [title] Position the ball on the stalk of the ball. (D) Place your index finger near the top of the ball on the opposite side of the seam. [substeps] The thumb should sit either about two to three inches down the seam.
Output (English): A