It's 'a' from still left pinky, 's' from still left ring finger, 'd' from remaining middle finger, and 'file' with the left index finger. Psst! You might have more entertaining with groups. Invite your buddies for collective research and competitions. Groups do the job well for instructors far too. http://learntotouchtype11188.blogstival.com/18738952/about-best-keyboarding-software-in-education