According to "Honghong lent Mingming money to buy a dictionary, but he still has 20 yuan left", we can know that Mingming and Honghong have more money than dictionaries. According to "Mingming lent money to Hongming to buy masterpieces, and he still has 4 yuan", we can know that their total money is 4 yuan more than that of masterpieces, so masterpieces are 20-4= 16 yuan more than dictionaries. According to "The price of masterpieces is three times that of dictionaries", we can get the money of dictionaries: 65438. According to the meaning of the question, it is clear that the amount of money is less than that of 8 yuan and the amount of red money is less than that of 24 yuan. Then the integer answer to this question is as follows: 1. When 7 yuan is clear, the red 28-7=2 1 yuan.

2. When I was in 6 yuan, the red color was 28-6=22 yuan.

3. When I was in 5 yuan, the red color was 28-5=23 yuan.