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