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