Your goal is to find the secret four-color code. The following colors are possible: brown, green, purple, white, yellow, blue.
Some guesses have already been made. I will provide feedback for each guess made with which it is possible to unambigiously determine the secret code.

Previous Guesses:
Guess: ['green', 'blue', 'brown', 'yellow']. Hint: one color is in the correct position and three colors are in the secret code but in the wrong position.
Guess: ['brown', 'brown', 'green', 'yellow']. Hint: three colors are in the correct positions.
A B C D
green, purple, white, yellow yellow, brown, purple, white blue, brown, green, yellow yellow, blue, yellow, purple