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