Mrs. Thomas, an 82-year-old female, suffered a recent stroke and is now experiencing dysphagia (difficulty swallowing). Her current body weight (CBW) is 88 lbs (40 kg), and her usual body weight (UBW) 6 months ago was 114 lbs (52 kg).

How many pounds did she lose over the course of the past 6 months? Round your answer to the nearest whole number and enter it as a whole number only, with no other characters.