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