Visual acuity in each eye is tested as the opposite eye is covered with a solid object. Patients look at an eye chart 20 ft (6 m) away. Normal and abnormal vision is quantified by Snellen notation. Which of the following Snellen notations indicates that the smallest letter that can be read by someone with normal vision at 40 ft (12 m) has to be brought to 20 ft (6 m) before it is recognized by the patient?