Your goal is to find the secret four-color code. The following colors are possible: blue, purple, brown, red, white, yellow.
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: ['red', 'yellow', 'brown', 'purple']. Hint: three colors are in the correct positions.
Guess: ['blue', 'purple', 'brown', 'brown']. Hint: one color is in the correct position and one color is in the secret code but in the wrong position.
Guess: ['purple', 'white', 'yellow', 'purple']. Hint: two colors are in the correct positions.
A B C D
red, white, brown, purple red, purple, blue, yellow brown, red, blue, red brown, purple, white, blue