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