Add the middle-finger home-row keys D and K.

Move only the middle fingers, then return them to D and K after every reach.

练习输入: d, k

目标: 95.00% 准确率.

D and K Guided Practice: ddd kkk dkd kdk dd kk dk kd fdf jkj dfd kjk fd jk df kj fdk jkd

D and K Review: df jk fd kj dfd jkj fdk jkd dkf kjd dff kjj fdd jkk dfd kdk fdjk