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