Alphabet programming

By continuously clicking on a letter, you can obtain the sum of multiple letters
During the process of clicking again, a simple calculation needs to be performed to convert letters into corresponding numbers
The letters are composed of complex patterns of multiple colors, and you need to eliminate the interference of colors to obtain the black part that corresponds to the letters in the image
The cumulative number of errors cannot exceed three times
Winning is achieved by continuously clicking and adding letters to obtain the target value