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